461 double hump heads specs. The thing that got me to swap from the old .
461 double hump heads specs I think . 60" valve -461 heads have 66 cc chambers w/ factory reliefs around the intake valve. as u can c the cambers aren't even close. 5 or 2. 1976 firebird, 357ci. 875" stroke crank), they made 12 HP less than a pair of 200 CC Dart Pro 1 Platinum aluminum heads. 50 & 2. 8cfm. Chevy sbc v8 bare aluminum camel double hump 461 cylinder heads Aluminum gm 3782461 chevy 327 sbc camel back/double hump cylinder head Hump sbc assembled Sell gm sbc chevy corvette camaro nova double hump head 3927186350. 094 54. The most famous heads are the 461 and 462 heads that offer 160-cc intake ports, 64-cc chambers, and 2. 410 lift), and dual exh. Hot tanking, glass beading, magnaflux for cracks. 025lift 14. 560" max spring pocket diameter; Aluminum double hump head cast C3 Tech/Performance - I just saw these beautiful aluminum 461 double hump heads! - Little pricey, but vastly improved from the originals. General engine tech -- Drag Racing to Circle Track. 02 valves and L-79 cam was 350HP. 5-inch valves or they might have been made with 2. 00obo call or text thanks! (817) 991-8939 They aint mine and i have no financial interest C2 double-hump head specs – 3782461. 94" intake and 1. 02 and 1. 5 valves, and the ones above 300hp. 72 since the 3782461x was the head with the larger 2. I don't think any passenger car had the 2. 6 461 camel humps that were set up for a 540 lift solid cam. Hole heads 300. They came on 64-66 Chevies. com) I had to wait almost three months last year to get my factory heads done, and it was not cheap. 5” valves, the L76 327 and L84 327 versions were With pocket porting and port matching, they're still a damn good head. And a 12 bolt with 3. Hump fuelie porting Chevy sbc assembled aluminum camel double hump 461 cylinder head Heads hump double sbc technical jalopyjournal jpeg forum 3890462 sbc double hump camelback heads 1967 camaro chevelle corvette. had 2. The "041" head was a 1969-1970 high performance head, with the same exact performance characteristics as both the "186" and "187" Camel (double) Hump heads. 50s that have been hogged out to 2. The 1964 Corvette L79 327 is legendary, learn I've been very curious about the aluminum Trick flow "fuelie", "camel hump", "double hump" - whatever you want to call them. the 61 FI heads were 461 castings, the first with the double humps-----thus, THE origin of the "fuelie" head. 5" exhaust manifolds, the higher hp Corvettes (above 300 hp) did. 050 29. ) Today I got to looking at the 327 engine in the '68 Chevy that I bought from a little old lady This is for a Pair, two, very rare 461 X Heads GM part # 3782461 Also known as Double Hump Fuelie Heads Fits Chevrolet Corvette model years: 1961 mid to early 1962 w/ Special High Performance - confirm with us first this fits your build - Do Not Buy because eBay says this fits your car We have real matching pairs Most heads have 1. Number 3782461 is The exh can be made to go over 200 cfm but it take alot of hard to come by detail work in conjuction with the needed valve job specs. Though most of these heads had 1. A 327, 461's with 2. 60 valve heads depending upon the engine RPO and which Chevy the engines were installed in. Incorporates extra-thick decks and walls for improved reliability; Machined for 3/8" screw in studs; Accepts Large “camel humps” 291, 461, 461X, 462: Original hi-perf or “fuelie” heads; chamber sizes are 62-64cc; both 1. Chevy 461 double hump cylinder head comparisonChevy 327 "double hump" cylinder head fully rebuilt casting # 3917293 Heads 3782461 chev chevrolet double hump small block sb central ottawaChevy sbc assembled aluminum camel double hump 461 cylinder head. All stock interior. My question: what were the stock valve sizes on these??? My understanding is that the "-461" had the bigger 2. IMHO If you’re looking for good aluminum heads at a good price than you should look at Skip White NKB-200cc heads. The top head is the 'lower horsepower' version (300hp and under) used on 67-68 327 applications with 1. The good thing (relatively) about the early heads is the smaller chambers The double hump heads were factory installed on all High Performance Fuel Injected and carbureted Chevrolet vehicles including Corvette, Camaro RS SS & Z-28, Chevelle Malibu, Chevy II Nova, Bel Air, & Impala. Nice fastburn chamber and Thus, to stay with what appears to be a "period correct" head for your purposes, with double humps, your choices are 461X, 461, 462 castings from 61 to 67. This is another good performance casting. 99. If the H. 485 179. I'm mid-build on a stroked 327 for my 67 Nova. Talk to the 461 SBC double hump head features improved port/chamber shape for better performance with the 3-angle machined valve job that promotes better flow, especially at low-to-mid lifts; IMHO, real fuelie heads are the -461's!! Look for the distinct double hump casting on the ends of the head. They definately need a Set of double humps on craigslist dfw $300 Fresh'n up pair of sbc double hump heads,casting #3890462 66-67 non acc. 461 heads had a quench area behind the spark plug, whereas the 462 had the area behind the spark plug relieved. 60-inch valve sizes. 186 casting double hump heads. They come 20 pounds lighter than factory cast-iron 461 double The 461 head was cast from 61-66, in both small and large valve versions. 0122, 7am-10pm CST, 910-3782462 Chevy SBC Assembled Aluminum Camel Double Hump 461 Cylinder Head. It was available from the factor with both 1. 550 lift with big inch sbc Also if you run much more than 350-360 ci your really limiting the power potential, on 283-327 they run awesome and if are in good shape can be freshened up reasonable priced. I want to do some mild porting, but would like to build up the outside wall thickness in critical areas before I start. I have a similar set up in my '55 chevy and 4spd, 355ci , roller rockers, aluminum factory mid rise Vette intake, 2. 60 valve versions available; 291 on 327’s thr ‘68; 291 have temp sender hole; 462 don't Double On the 461 double hump heads the "X" version had larger intake runners. These have been on the shelf for about Chevy SBC Assembled Aluminum Camel Double Hump 461 Cylinder Head made by Speedway Motors, for as low as $419. C1 & C2 Corvettes - Double-Hump Head Specs ? 3782461 - OK, dumb question time. Not trying to steal the thread, but how much are these holding me back compared to the other heads in question? In 1961, the FI engine was available in a 315hp/283 version and that was the introduction of the first double hump heads with BIG 1. 94“/1. straight plug heads I'm sure it didn't come with 2 diff heads from factory (diff dates) the head on top #s are 3782461 / C156 / GM16. 447", (-151 cam), or . Nice fastburn chamber and Check out these Chevrolet double-hump cylinder heads and you'll find out why most are the same but NOT equal! Check out the details, modifications, and tests we run on Chevy SBC V8 Bare Aluminum Camel Double Hump 461 Cylinder Head made by Speedway Motors, for as low as $498. Made from premium grade, lightweight A356-T61 aluminum, DHC 175 heads feature the exterior styling and straight spark plug holes that deliver the nostalgic appearance of the original factory performance 186, 291, 461, 462 "double The first one is a 461 and the other is all the rest of the double humps. Cut spring pocket to fit COMP Cams 986 springs. 6 Dirtrack 55 those SR Dart heads look nothing like a Camel Hump. oil used is ULX110 - 20w50 engine was started and rings bedded in by builder. Bigger valves and bigger ports. Double-hump heads from trick flow give modern performance and vintage looksChevy sbc assembled aluminum camel double hump 461 cylinder head Chevy sbc assembled aluminum camel double hump 461 cylinder headHeads hump double sbc technical jalopyjournal jpeg forum. compare the dimensions and the physical characteristics with known double hump specs. 6-inch valves. 194 101. Free shipping when your order includes this part. The bad news is the 461's are 327 High perform/High Comp heads. com/Chevy-SBC-V8-Bare-Aluminum-Camel-Double-Hump-461-Cylinder-Hea 291, 461, 461 and 462s are ak camel hump heads. Theses had 60cc chambers instead of the normal 64cc chambers that came out later 1967. 12-224-4 - Magnumâ„¢ Mechanical Flat Tappet Camshafts If using a 1003 or 1004 Fel-Pro the hole that is required in the deck of the block that is not there on a lot of older blocks and has to be drilled, This hole also has to be drilled in the 461-X head. Over the years I've had six or more 327 engines and probably a couple dozen double-humper heads (castings 461, 462, 186, etc. Step back in time with our modern reproduction of the iconic Chevy 461 double hump cylinder heads, now cast in lightweight aluminum! In this video, Joe and Wyatt discuss the features that bring the vaunted Chevrolet Small Block Camel Hump Heads (Small Camel Humps) In this video we get a tad bit confused over the Casting Numbers Watch me struggle to figure this -I have 3 sets of double hump heads that have been unshrouded. 525 lift / 108CL stock stamped 1. 9 cc valve reliefs Forged crank and rods. Both heads used the double hump symbol. This was the biggest, or most advanced head ever made for the small block. Longer post but detailed. I beleive the intake runners are about 8 to 12 cc bigger than the other camel humps. 60 valve heads were not factory installed on engines installed in the full-size Chevrolets. Heads hump double sbc vortec technical yeah know its but jalopyjournal forum Chevy sbc assembled aluminum camel double hump 461 cylinder head 3890462 sbc double hump camelback heads 1967 camaro chevelle corvette 461 Double Hump Heads, 2. Double-Hump Heads from Trick Flow Give Modern Performance And Vintage Looks. The 1964 Corvette L76 327 is legendary, learn more about this The 416's have very similar ports to the old 461 and 462 Double Hump heads and almost identical port volume. 50 This is for a Pair, two, very rare 461 X Heads GM part # 3782461 Also known as Double Hump Fuelie Heads Fits Chevrolet Corvette model years: 1961 mid to early 1962 w/ Special High Performance - confirm with us first this fits your Chevy SBC Assembled Aluminum Camel Double Hump 461 Cylinder Head (speedwaymotors. The 461 and 462 were Today in the shop we’re learning about our new aluminum double hump cylinder heads for the small block Chevy V8. The original Fuelie head was #3782461, commonly known as the 461 head. 6 valves. Studded, guide plates, the small stuff. The 300 hp. 4. Yes, fuel injection WAS also available 57-60, BUT, the DOUBLE hump head first appeared in 61, and that is when the nickname "fuelie" head was attached. This is the only double hump head that doesn't have this hole. Of course there is the 292 "Turbo" head which is the very first over The 1967 L30 (327/275) head used either the 3890462 (early) or the 3917291 (late) with 1. That kid who is making 500HP (Horse Piles) with 461 headshmmm, maybe with some 416's! The double hump heads were factory installed on all High Performance Fuel Injected and carbureted Chevrolet vehicles including Corvette, Camaro RS SS & Z-28, Chevelle Malibu, Chevy II Nova, Bel Air, & Impala. You can see the 461 has a spark plug hole lower, closer to the piston and there is no tapering off below the spark plug like the other one. 979. From the limited specs on hand and what I remember, FWIW, it has 10. The best hydraulic is the L46/L82 (962 cam) as it has slightly more lift and duration than the 151 Step back in time with our modern reproduction of the iconic Chevy 461 double hump cylinder heads, now cast in lightweight aluminum! In this video, Joe and Wyatt discuss the features that bring the vaunted camel hump heads into the Depending on the source,flow for a stock 461 w/ 1. 50) With thinking about going up to (I-2. The "standard" 461 head's intake port volume was 161cc, exhaust was 62cc. I was under the impression that the 461 / 462 castings were the ones used on the old fuel C3 Tech/Performance - I just saw these beautiful aluminum 461 double hump heads! - Little pricey, but vastly improved from the originals. The regular 461 casting was used between 1964-1966 and could be found on 327 "X" heads had double hump casting marks as well. They use Based on the iconic “double-hump” or “camel-back” (fuelie) cylinder heads of the ‘60s and early ‘70s—including the famed 461 Fuelie heads—the DHC 175 castings are The 461 casting head has a different looking combustion chamber than the other double hump heads. Trick Flow® DHC™ 175 Cylinder Heads for Small Block Chevrolet TFS-30210003 TFS-30210003. A wide range of casting numbers are associated with double-hump heads. 94 valves:. Fits Chevrolet Corvette model years: 1961-1962 High Performance Chevrolet Small A friend of mine came across a guy selling a 327 engine with a set of 3927186 fuelie heads. 60 valves AND the "-461X" had the smaller 1. Chevy Double Hump Head Specs. Holley Strip Dominator Stock / 750 double pumper 4 hole idle carb stock. Jim Double hump heads. The Standard double hump head had 1. I've had a few sets of 461 Interestingly, the NCRS spec guide does not distinguish between 461 and 461X during the time frame that they were used. In the case of the 441, heads with the "X" has the same intake runners as the regular 441 but the combustion chamber was 80cc instead of 76cc. 050 244/252 duration 110 LSA/ 108 Intake Center Line PN: 12-664-47 Heads: 462 Double Hump Castings 2. I know these are camel hump heads built on February 26, 1966. 388 178 . engines. Please impress me with your old school This is a matched set of Chevy "461" double hump heads both date coded B 6 5. The bigger heads to follow were the “double-hump” heads championed by the mid-’60s 327 engines. Those double-hump heads generally have 64cc chambers. "291" – Could be 3912291, or 3917291. Heads with tall casting marks were identified as 291-, 461-, 461X- and 462 castings and did not have accessory bolt holes. com) Making the Double Hump heads run 7,000 rpm for 3,000 laps Check Details Heads double hump sbc technical arroyo grande ca. If I were building a SB400 (and I've done a few, and there are 4 in my C1 & C2 Corvettes - Beehive Springs in 461 Double Hump Heads - I was considering installing a different cam in my 327 that would require a double spring. I have people say to me 'I have double humps', and I tell them, 'sell 'em or junk 'em and get some real heads'. If your 16 years old and already have them run them. 02 intakes and the 1. The only difference I know of were the carbs & In 1965, all 327 engines in Chevelles, Sedans and Corvettes had double hump heads. There was a lot of discussion, opinions, and a lot of information, both published and unpublished, about the differences; everything from combustion chamber volume, quench and squish areas, and runner and port volume. The regular 461 casting was used between 1964-1966 and could be found on 327 engines. At peak, AFR 195 CC Eliminator heads were 40+ HP over the Dart heads at peak. ARP bolts, balanced Zero decked, align honed Trick Flow DHC Heads. double-hump heads never came w/ small valves in them. Read More. Although they don't have the double hump, 041 castings have everything else that is desirable in a high performance head. The 461x The 186 was the first large valve/64cc chamber head with accessory bolt holes. They have the 2. Part Number: TFS-30210003. 175 cc intake runner 60 cc Chambers Chevy SBC Assembled Aluminum Camel Double Hump 461 Cylinder Head (speedwaymotors. Solid LT1 Member my buddies ss heads were angle milled to 58cc where spec is 57. "461" camel back heads, edelbrock, When dyno'd on the Vette's rebuilt 327 (. 02/1. 5 (bowl blend) heads, flowed ~224 peak (can’t find the flow sheet). i have also had some down to 56cc (IIRC, it may have been 58 too but was in the 50's) Chevy SBC V8 Bare Aluminum Camel Double Hump 461 Cylinder Head - https://www. C2 double-hump head specs – 3782461Heads trick flow hump double sbc head fuelie dhc bolt exhaust port emulate iconic performance representation cad developed engineers showing 1967 chevrolet chevelle malibu 64365 miles gold coupe 327 v8 doubleHump sbc assembled You need the casting number (on top) as valves can be changed. comp. 02"/1. [ March 09, 2003: Message edited by: V8 S-10 ]</p> As a side note, the only double hump heads with accessory bolt holes are the 041, 186 and 492. C1 & C2 Corvettes - Double hump 291 and 461 heads - I have a set of 291 heads that I was running on my 1974 355 engine. Those are the only double hump heads that do not have the center water holes in the decks. but as I recall the 461 heads have about a 165-170 cc intake runner, so Step back in time with our modern reproduction of the iconic Chevy 461 double hump cylinder heads, now cast in lightweight aluminum! In this video, Joe and Wyatt discuss the features that bring the vaunted camel hump heads into the 21st Century. The engine checked out to be a 66-67 327 out of a passenger car F0508HCH on the block, so it's nothing special but the heads look to be good fuelie heads. The double hump / camel hump heads were factory installed on all High Performance Fuel Injected and carbureted Chevrolet vehicles including Corvette, Camaro RS SS & Z-28, Chevelle Malibu, Chevy II Nova, Bel Air, & Impala. It had a th-350 with a 3k stall and a tunnel ram with 2 450 holleys. 6 stainless valves Deshrouded, pocket ported, screw in studs, guide plates, new guides, hardened seats, Magnum roller tipped rockers. 6 inches for the intake/exhaust. "461" – Could be 3782461, or 3782461X. 076 cc combustion chamber. The stock 283 used a 58cc chamber. 6" valves, 64cc fast burn chamber, raised valvecover rail so stock Hi & thanks agead again for the great feedback. 60". Wyatt and Joe compare them with the original GM 461 casting or "fuelie heads" that debuted on the 1961 There is no discernible difference between a 291 and a 462 head. Would need to see lots of specs to really pick a cam. most people ref. 4. 94 intake. Here are the specs so far 327 bored . 94 valves was 300HP. Note that with the 186 heads producing intake flow numbers over 265 takes you to the tiping point where you will start to drop off some of the lower lift flow range numbers, but the added port area and volume will help the motor hang on 461's will need the steam holes drilled for the 400 also. GORDON 1967 Camaro RS, L30 Looking to upgrade my cast iron 462 camel hump heads for aluminium 461 with 2. You can run it a few degrees advanced beyond spec for added DCR at low RPM's. 00. (11 to 1 Comp) The other Chevrolets it was 275 and 325HP. 02 intake valves. Most older blocks don't have these holes and need to be drilled when using most performance head gaskets. 7 Here's after installing 2. Correction : The 461 head is more popularly referred to as the “Fuelie” head, because it was introduced as standard equipment on the 1962 327ci Corvette engine that was fed by a mechanical Rochester fuel-injection system. Last, the 492. 75 C1 & C2 Corvettes - 291 Heads - What is the difference between at 461 and a 291 head / I know they are difference years but are the chambers bigger in one ? They are both called fueley heads Is one better than the other?The guy that has them said the temperature sender is in the pass side head Maybe that help tell Back in the 60's and 70's they were THE performance head for SBC's. 94 intake valve seat In the very, VERY beginning (61), the double hump heads FIRST appeared on the 315hp-283 Fuel Injected Corvette engine-----ONLY! From 61-63, THE ONLY valve sizes were 1. They are probably 1. The easiest way to reference any production head is with the last three digits of its casting number. C3 Tech/Performance - I just saw these beautiful aluminum 461 double hump heads! - Little pricey, but vastly improved from the originals. Doesn't the double hump head family run outta steam above about a . 5 valves (big for back then). The 461 2. Visually similar to the 461 heads (GM # 3782461) which first appeared on the 1961 Corvette “fuelie” Step back in time with our modern reproduction of the iconic Chevy 461 double hump cylinder heads, now cast in lightweight aluminum! Also known as "fuelie" heads, the 3782461 The problem with adding bigger fuelie style cylinder heads like the 461 or 462 is that, while these heads increase airflow over a stock 283 head, this also increases the combustion chamber volume. All of the research that I done, led me to believe that the "461X" heads were used on the Corvettes with fuel injection. 02 valves, 60degree bowl The combustion chambers have improved port/chamber shape for high efficiency, quench, and burn. 11-1 comp. 73 gears. . It was originally produced for the 327ci engine, then superseded by Head specs: Double hump 3782461, date I184 September 18 1964 or 1974. a pair, iron 461 double humps for a 195-215 cc runner 64cc chamber aluminum head , USA made perfered. Milled valve seats. I. the bottom #s are 3782461 / J235 / GM12. These heads have double hump casting marks. 02 & E-1. The 461 head was cast from 61-66, in both small and large valve versions. speedwaymotors. These heads will You can still get some early no accessory bolt heads if you look for camel hump heads. ONLY the 315hp/283 FI engine got the new, unique, double hump 461 heads-----no other engine had the double hump heads. Vortecs supposedly flow in the 230's @ . They have 62 cc chambers but the valve size is not specified in Morton's. See More Specifications | Check the Fit. They are also called double hump heads. 300hp 327s and the 350 hp angle/straight plug heads are different. Other similar double-hump heads are the "291" (3917291) and "492" (3991492). For these original 461 head specs, what does it mean to have no accessory holes? "461" heads were cast with either 3782461 or 3782461X. 60" valves in them. 50 or 2. Has anyone ever cc'ed Double hump 461 chevy head features 180cc intake runner, 62cc exhaust runner, 2. Chevy L79 327 Engine I History, Specs, & Build Ideas. 3:1 compression, Comp 280 Magnum. In some bench-racing circles, all double-hump heads are classified as Fuelie heads. 5 rockers / springs were ~100# closed 300# open. Thanks Fred! Great stuff. The 461 head had no chamber below the spark plug, it was machined flat when the head was made. on 350's. There are much better heads available to day but I went for the old the 461 heads are very nice heads, but the vortec is a little better performance wise. I saw the TFS camel hump heads at SEMA in A wide range of casting numbers are associated with double-hump heads. Both were used between '64-'66 on the 327cid and had 64cc chambers. 60, hardened seats, pocket ported, and port matched by Flow Technology some 16+ years ago ($150 back then) and the other day the car did 293 hp and 293 ft-lb at the wheels on the dyno. Call 800. It was used on 62 fuel injected 'vettes, thus picking up the "fuelie" nickname. Because of this I have heads stamped with # 378241. com) Trick Flow specs: (Intake runners and chambers are too small) Combustion Chamber Volume (cc): 60 here is an article on the 200 cc Double Hump Heads from TF coming. My heads Pat's Page (Dynamic CR Calculator, car specs) Shop equip for sale. 02” and 1. Heads, not a fan of the sportsman II's, Dart Iron Eagle Platinums better imho. 60 valve heads, like the 462 2. 22) 1/8th & we’d like to swap the worked over & heavier by 40 ish lb. 456", (-346 cam)? the only difference between the -461 and -462 heads is the -461 still has a solid quench area over by the sparkplug! Click here for full screenshot and engine specs Chevy Double Hump Head Specs. Not square, not triangle, but 2 humps kinda the outline shape of the stud side of a pushrod guideplate. Their site says 1. Average double roller chain. They have been tinkered with a little. 94 and 1. DV: If memory serves me(and that's debatable) the 327 was introduced in '62 and, except for Corvettes, was only available in 2 versions: 250HP & 300HP. 2. 94 intake and 1. 02 intake and 1. These would be correct for a 1965 Chevrolet application. bigheadmotorsports (253) 100% positive; Seller's other items Seller's other items; Contact seller; US $675. This is Garage Sale priced because an install was attempted. 5 and 2. Chevy 327 "double hump" cylinder head fully rebuilt casting # 3917293Chevy sbc v8 bare aluminum camel double hump 461 cylinder heads Hump sbc chevy v8 cylinder headHump double head c2 specs 1969 corvetteforum 1968 corvette chevrolet. 500 lift & are said to be able to support 400 HP. 02 valve to your heads are the 350hp heads with the larger valves. Keep in mind tho the Vortec has a much better & efficient chamber design than the 50 year old The first number is a "3" so the head number is 3782461 with a date code of April 10, 1965. 520/. 50" exhaust valves. A video on flow-testing factory and aftermarket double hump heads: Trick Flow Double Humps vs Stock Double Humps Info And Real Flow Numbers (youtube. Comp recommended their 26918 beehive as a substitute instead of cutting spring pockets. 94/1. Summit Racing™ Cast Iron Cylinder Heads for Small Chevy SUM-152123 SUM-152123. Think you have to scour the local bone yards to find a decent set of GM's old double hump or fuelie cylinder head castings? Not true. I I'm going to have some work done on old 461 Double Hump Heads that currently sit stock with a (I-1. 94 or 2. build had a Nelson Racing Engines'-built 406cid with a pair of Sportsman II's that were milled to look like the OEM-spec' casting #186 "late The 327(331) I just pulled out had 461 double hump heads, 10. The high performance double hump had 2. 040. 04" valves and blending the port into the the valve seat. 6 valves, just depended upon which vehicle GM put them in. They do ok for street 1970 chevrolet nova 383 auto double hump heads power disc tilt columnBlock small hump double chevrolet heads sb chev ad report Hump double head c2 specs 1969 corvetteforum 1968 corvette chevroletChevy sbc assembled aluminum camel double hump 461 cylinder head. Torque plate honed Forged flat tops with 4. Chevy SBC Assembled Aluminum Camel Double Hump 461 Cylinder Head Thanks Fred! Great stuff. 50 heads thanks in advance, John . 60”. New retainers and locks. Talk to the experts. Valves 2. 500" lift b/c they weren't meant to run much above . I can't find it right now but I had an article with flow bench numbers that showed they flowed about the same as the old 461/462's with 1. 95/1. The head casting number, 3991493, is located in The "462" double-hump castings are similar to the 461's but with the spark plug mounted slightly higher. 540 lift @ . Good small valve heads would be the about 137 to 140 cc Step back in time with our modern reproduction of the iconic Chevy 461 double hump cylinder heads, now cast in lightweight aluminum! Joe and Wyatt discuss the features that bring the vaunted camel hump heads into the 21st Century. This is what I gathered from info researched on the old school double-hump heads. 50 , if i were to run flat top pistons and a 480 ish lift cam and headers and a 600 Holley what sort of power/torque should i expect ? Also what spec Converter for my 461 "not X" heads have a 155 cc intake port. 040" over with a turned-down Callies 3. Look for 461, 462 There is no discernible difference between a 291 and a 462 head. The good news is the 461's are 327 High Perform Heads. While these heads were spec'd at 64cc's, few actually are that small unless they've been milled. varies depending upon head gasket used and how far down in the hole your pistons does anybody know the flow numbers for the 461 double hump heads. The 461 heads had a 62. They are a camel hump head for a 327 sbc. There is a lot to be gained with the L79 as well, the hydraulic cam helps build more torque over the solid-cammed L76, but the Hi guys i hope you can help me i just want to know which set of chevy camel hump heads flow better the 461 or 462 im bearly going to start to rebuild my engine i still need alot of parts to finish my project but i want to Key Features of Double Hump Heads Casting Numbers: The easiest way to identify double hump heads is by their casting numbers. 291 148. 50 valves but actually performed a little better at lower engine speeds, they had better mixture velocity. I recently bought 2 pair There are a lot of castings to choose from when running the Chevy Double Hump heads. Check Some of the better head guys in the country might get 4XXHP out of those dinosaur heads but the runner is small, tiny. The heads on my engine Flow characteristics, on double hump heads are very limited, even with drastic porting they wont flow much past . 20 valve 461 double humps because they are traditional and flow well, I am not sure the specs on the 30 The 461 castings are not the most desirable chambers in the double-hump family of heads. tried the combo on Engine chev 186 double hump heads. Here's the stock flow specs on your head with 1. 60" valves, a 64CC combustion chamber, DO NOT have accessory holes, intake port volume of 161CC's, exhaust 62CC's. But the go to big cam for sbc is old school build is the comp 294s in my opinion. OKso someone de-shrouded the chamber for the 2. These heads have a 64cc combustion chamber and were originally supplied with either a 1. 60" exhaust valves, 1. 60). I have 1. The 461 heads were also factory built with 1. And a build code of B266. Offered in 69-71, on high performance 350's, and as a service replacement for the 64cc heads. My friend ran low 12's on a set of 1. Has a triangle, instead of double hump. 60 valves will buy bare heads so I can found some 461 double hump heads but with the smaller valve sizes 1. Heads hump double sbc vortec technical yeah know its but jalopyjournal forum Chevy sbc v8 bare aluminum camel double hump 461 cylinder head Who has achieved most horsepower and torque from 383 with double hump. Not sure if the springs are the stock style springs. Comp 308 H8 Hyd flat tappet 308/260 @ . 1. 50 valves. They were used on a few 250 hp. So, I’m freshening a street engine with a pair of 1964 461 double hump heads. It was originally The specs are the same, they use the exact same heads, rotating assembly, and intake. Those match a 350 better. 94 & E-1. They had 2. Double hump casting marks. By the way this was in a street driven 65 impala. Intake/exhaust port volumes were about 170cc and 64cc and valve diameters were either 1. I have a ported set of double hump heads on my 406 engine. -462's are 68cc-461's are 67cc-a single 041 and a single 492 are 68cc's each. I'm rebuilding a 1969 DZ (Z28) 302 to as close to factory specs as I can including date codes. Curious about which valvetrain at cam specs when you do it. Fix I enjoy my 461 double hump heads. 02 intake valve. They weren't ever put on 283s that i know of because they are for a 4" bore. engines, but mostly 275-300-350-365-375 hp. The 461x If you’re set on the double hump appearance than Trick Flow heads are the way to go. 5. 390/. World Products S/R Torquers copied the chamber of the old "camel back" heads, have a slightly larger intake runner and outflow the old "camel back" heads! The thing that got me to swap from the old Nothing wrong with 462 double hump heads on a 327. is stock,then that needs serious attention. 180cc intake port volume, 2. My stock 2. "real", fuelie heads are the -461 heads that have 2. For the record- the largest intake runner of any small block chevy production camel hump heads were 172cc 461X castings, most 462's, 461's, and 291's were 160cc-167cc. Get the last 3 digits of the casting number and post them up for us, it'll tell alot about the head. Having reference examples can be a game changer. 02 & 1. John, In 66 A Corvette with 327, 600 Holly and the 461 heads with 1. I have a pair of big-valve -461's Because of this, 461 heads cannot be flat milled to the same degree as 462 heads. Moderator: Team. Jump to Latest To build a set of race prepped cast iron 461 heads was a lot of work. 02" intake/1. Both were excellent OEM heads. 5cc. These heads will The Dart Iron Eagle S/S (their 165cc intake runner) flow similar to the 461/462 heads form the 1960's and have an updated chamber (fast burn). 050 / . With proper porting 230 cfm is realistic. They were available with 2 different valve sizes, 1. Top. I have had 461X, 461, and 462 leak in the short side radius after installing the 2. 5-1 CR, small 4 bbl carb, same cam as most other non hi-po small blocks (. In 1960 Chevrolet planned to equip both "low horse" (mild hydraulic cam) and "high horse" (Duntov cam) FI engines with aluminum heads, and they were advertised as 275 and 315 HP, but problems forced cancellation of the # 461 heads were used from ' 62-66, and then changed over to # 462 heads mid year 1966. to double hump heads are thinking the 300 hp smaller valve heads, or at least i do. 50 exhaust on standard 327's and some early 350's and 2. It also is a 64 cc combustion chamber. It seemed soggy to me. I was looking around a good big yesterday on these and found a forum that I want to say that it is the pre-'64 medium valve -461 heads that are down around 62 cc's stock. These were an excellent performance head. 50 valves can range from 202 cfm to 218 cfm. 6 valves Instead of a double hump indentification mark, these high performance heads have a trangler identification mark. 450" to . 22 posts I run std 91-95 octane (Australian spec). and lower engines had 1. I need the flow numbers so that i can put it in desktop dyno. E. C3 Tech/Performance - Head tech info: 186 small to large valves - Happy Memorial Day! I imagine this question has already been answered but my search has not found previous post so here it is again. NO WARRANTY, NO RETURNS ON GARAGE SALE ITEMS Visually similar to GM casting #3782461, which first appeared on the 1961 Corvette “fuelie” No accessory If you’re set on the double hump appearance than Trick Flow heads are the way to go. In this video we discuss what is the best casting to start with for you 461 heads double hump Chevrolet Chevy SBC stored 40 years 3782461. 461 and 461X (double hump)-These were the original double-hump castings and feature 64cc combustion chambers and a 2. Valves were 2. ( i prefer a solid cam with those specs) The torkerII intake is not my favourite but it works ok. New full roller rocker arms. They have had minor port work done to them and they have the 1. These heads were the "only way to go" back in the day - plentiful and resonably priced, yet surrounded by the usual clueless lore and mis-information that is so often part of "hot-rod tech" at bench-racing sessions. start by checking the casting numbers on the intake side. The heads for '65 250 hp 327's anyway were the #461 Chevy sbc assembled aluminum camel double hump 461 cylinder head. The 461 casting head has a different looking combustion chamber than the other double hump heads. And With the large variety of really good aftermarket smallblock heads the last few years prices on the old double hump heads has gone down a bit. I have replaced them with a set of AFR aluminum heads and now have the 291's off for a re-build. 44 double springs installed,also,,they were machined for the umbrella seals and have had hardened seats installed. I also think that they See More Specifications | Check the Fit. Nice fastburn chamber and Engine Works True Double Roller Timing Set (there most expensive one, seemed to be best bang for $$$ 14X) Cam Specs: Comp 4/7 Firing Swap, Pro Plasma Nitriding, Solid Flat Tappet. The 492, 292, and 186 heads have a slightly different looking camel hump. Specs, and Build Ideas. The combustion chamber looks The factory 461 iron casting SBC 327 heads, also referred to as “double-hump” heads, were the best that GM offered at the time. These heads may have come with 1. I give the thumbs up for the camel humps. Hump double head chevy block small tensema16 returns hotrodC2 double-hump head specs – 3782461 Hump double chevy camel 03-01-12 05:56 PM - Post# 2197283 These are the original heads from my '65 Impala 327/250; I'll be rebuilding the entire motor (to 327/300 HP+ specs) but have a few general questions regarding the heads. 750 is a good size carb. Thus, the origin of the Fuelie heads. 310 outside diameter at the bottom of the spring. 02 intake and a partially machined Stock 461 1. They use For instance, the camel hump symbol (also called double hump) can be found on 461, 461X, 462, and 291 casting heads. The have large valves and the heads were purchased new for a corvette FI. Others say 375 HP in as cast form. Also known as Double Hump Fuelie Heads. 94 / 1. Rocker studs had to be removed, stands machined, screw in studs, three angle or better valve job (and in those days there was no Sirdi machine that cut all the angles at one shot, it was Hey everyone,,I have a matching numbers,,set of 461 heads. 1966 Oval port head; notice tapped bosses for spark plug shields. Our 70 Nova has reached all the 355 can muster ET wise (7. Look for last 3 numbers, example 461, Casting number 3767462 identifies Camel Back heads on 327 engines in 1962 to 1967 GM models. The I enjoy my 461 double hump heads. Speedway Motors also has a Double Hump look-alike head they call the Aluminum Camel Double Hump 461. No A few months ago I asked if anyone on this forum knew the actual differences between 461 and 462 cylinder heads. Head specs: Double hump 3782461, date I184 September 18 1964 or 1974. 60 exhaust valves with 7 degree locks and the stainless retainers. The combustion chamber looks to be smaller. This is for a One, Very Rare 461 X Heads 1961 Dated GM Casting # 3782461. Neither had accessory holes. afgylredunhwulcsafvwdwwzoiamxgjsqoswvcsinkyowiehmyxnzgo