SB Chevy Heads Casting Numbers

 

SBC Heads

CASTING#...Year....Size......NOTES

330545......73......350.......76cc chamber, 2.02/1.60

333881......74-75...350..........76cc chamber, 2.02/1.60

333882......74-80...350/400......76cc chambers

340292......70's.......Over the counter, angle plug, 64cc chamber

354434......75-79...262/267/305...60cc chambers

358741......76-79...305

376445......77-85...350..........76cc chamber, small valves

376450......75-81...262/267/305..6 or 7 exhaust bolt holes, 60cc chamber

462614......77-79...305..........60cc chamber

462624......75-86...350/400......76cc chamber, 1.72/1.5, 1.94/1.5 or 2.02/1.6 valves

458642......75-84...350..........350

468642......76-up...350/400

471513......79......267/350

517513......79......267/350

1816887.....63......283..........Made in "Canada", GMC HD truck

3636839.....55......265

3703523.....55......265

3713358.....55-56...265

3713569.....55-56...265

3725306.....56......265

3731539.....57......283..........283 HP FI

3731544.....57-61...283

3731554.....57-62...283

3731556.....57......283..........Truck, Made in Canada

3731762.....56......265..........Vette, 2x4 carbs

3737775.....62-67...283/327

3740997.....57......283..........1x4, 2x4 & FI (exc.-283hp)

3743056.....58......283

3743096.....62-67...327..........GMC Truck

3747363.....57-61...283

3747460.....59-67...283/327......70cc chambers

3748770.....58......283

3748772.....58-61...283

3755537.....57-62...283

3755539.....58-62...283

3755549.....57-62...283

3755550.....59......283

3755585.....62-67...327..........GMC Truck

3767460.....59-60...283

3767462.....62-67...327

3767465.....59-61...283

3767754.....59-61...283..........60cc chambers

3767792.....60-64...283

3774682.....60-64...283/327......70cc chambers

3774684.....62-64...327..........75cc chambers

3774692.....58-64...283..........60cc chambers

3782461.....64-66...327......Camel hump,no accessory holes,160/62cc port volumes,62cc chamber

3782461X....60-63...283/327..Camel hump,no accessory holes,larger 172/64cc port volumes, 62cc chamber

3795896.....63-65...283......60cc chamber

3795896.....62-64...327......60cc chamber

3798996.....63-67...327

3814480.....60-67...283/327..70cc chambers, 1.72/1.5 valves

3814482.....62-67...283/327/350..75cc chambers

3817680.....63-67...283/327

3817681.....62-67...327

3817682.....61-62...283

3836839.....55......265

3836842.....57-67...283/327

3837064.....56-62...265/283

3837065.....55-56...265..........Truck

3848720.....57-58...283

3876775.....60-67...283/327......75cc chamber

3884520.....60-67...283..........Some marked "Made in Canada", 60cc chamber, also used by Studebaker

3884520.....62-67...327..........Some marked "Made in Canada", 60cc chamber, also used by Studebaker

3890462.....66-67...302/327/350..Camel hump,no accessory holes,64cc chamber

3901068.....87-up...350..........Crate motor, 285hp, 64cc chamber

3911032.....68......307/327......70cc chamber

3912264.....58-62...283

3912265.....63-64...283

3912311.....65-67...327

3912313.....65-67...327

3917290.....67-68...307/327

3917291.....67-68...302/327/350..Camel hump,no accessory holes,64cc chamber

3917292.....68......327/350......Camel hump,64cc chamber

3917293.....67-68...307/327......75cc chambers

3927185.....69-76...307/327/350..70cc chambers

3927186.....69-70...302/350......Camel hump,64cc chambers,accessory holes

3927187.....69-70...350..........Camel hump,64cc chambers,accessory holes

3927188.....69......327..........74cc chambers

3927188.....70......307..........74cc chambers

3931633.....68-73...307

3931635.....68-76...350

3931638.....68......327..........Truck

3932441.....69-70...350..........76cc chambers

3932441X....69-70...350/400......80cc chambers

3932454.....69-73...307

3932454.....69-79...350..........Truck

3946812.....69......350

3946813.....69-79...350..........Truck

3947040.....68......327.........."Right angle" casting identifier, 64cc chambers, good HP head, used in trucks, no accessory holes

3947041.....69-70...302/350......"Right angle" casting identifier, 64cc chamber, accessory holes, good HP head

3947041X....69-70...302/350......"Right angle" casting identifier, 64cc chamber, 165cc intake port, accessory holes, good HP head

3951598.....70......400..........76cc chambers

3964286.............350

3965742.....70......350..........over the counter, angle plug

3970126.....67-71...327/350

3973370.....69-70...350..........over the counter in US, Canadian 350/300hp production use in Pontiac, 64cc, straight or angle plug

3973414.....70......350..........LT1-350/370hp, Camel hump, 64cc chamber

3973487.....71-72...350..........1.94/1.5 or 2.02/1.6 valves, was also used on '71 350/330hp LT1, 75cc chamber

3973487X....71-72...350..........1.94/1.5 or 2.02/1.6 valves, 75cc chamber

3973493.....71-72...400..........76cc chamber

3986316.....71......350..........76cc chamber

3986336.....71......350..........76cc chamber

3986336X....71......350..........76cc chamber

3986339.....71......307/350......74cc chamber

3986339X....71......307/350......74cc chamber

3986388.....68-76...307/350

3991492.....70......350..........LT1,Camel hump,accessory holes,64cc, straight plug

3991492.....70-up................over the counter,Camel hump,64cc, straight or angle plug

3998916.....72......350..........also used w/'72 350 LT1, big valves, screw in studs, 76cc chambers

3998920.....72-73...350

3998991.....72-73...307/350......75cc chambers

3998993.....72-73...307/350......75cc chambers

3998993....current..350.........Goodwrench crate motors,"Hecho en Mexico", 75cc chambers

3998997.....72-73...350/400......76cc chambers

3998997.....78-84...305/350......76cc chambers

4079261.....75......350

10033867........................Aluminum,over the counter Pontiac 23' head,62cc,angle plug, 196cc intake port

10045434........................Over the counter Pontiac 15' head 55cc, angle plug, raised runner aluminum, "roll over" head

10051101........................Bowtie, aluminum, 55cc, angle plug raised runner, 196cc intake port

10065202.....87-95...350..........Truck

10065203.....87-95...350..........Truck

10065204.....87-95...350

10065205.....87-95...305

10065206.....87-95...350

10065207.....87-95...305

10088113.....88-up...350..........Aluminum, 58cc, angle plug, raised "D" port exhaust, 1.94"/1.5" valves

10093328........................Over the counter, Pontiac 15' head aluminum,224cc ports, 61cc chambers, "roll over" head

10106178......90......350..........LT5, ZR1, DOHC, 32-valve, pass. side, aluminum

10106179......90......350..........LT5, ZR1, DOHC, 32-valve, drvs. side, aluminum

10110810......91-up...350..........Gen. 1, 65cc chambers

10120928......87-95...350

10125320......94-96...350..........Gen.II LT1, cast iron version, used on "9C1" Police package, Impala SS, Cadillac Fleetwood, Buick Roadmaster reverse flow cooling

10128374......92-up...350..........Gen.II LT1, 53cc, angle plug, aluminum, reverse flow cooling,

175/68cc ports

10134352........................Bowtie, 45cc, angle plug, "low" port, 223cc intake port, aluminum, 18' race head

10134363........................NOTE: This casting # has been used in many different versions of this aluminum 18' and 15' Bowtie race head. Different chamber volumes, port volumes, port locations, valve sizes, etc. were used. Check this casting carefully to determine which featuresit may have. There are at least 6 different versions as of 11/99.

10147898......95-98...350..........Gen.I crate motor

10159550......87-95...350

10159551......87-95...305

10159552......87-95...350

10159553......87-95...305

10174389......91-94...350..........LT5, ZR1, DOHC, 32-valve, drvs. side, aluminum

10174390......91-95...350..........LT5, ZR1, DOHC, 32-valve, pass. side, aluminum

10185040........................Bowtie, aluminum, 45cc chambers, 1st version, symmetrical ports, 263cc intake ports, splayed valves

10185040........................Bowtie, aluminum, 45cc chambers, 2nd version, symmetrical ports, 240cc intake ports, splayed valves

10205245......93......350..........Gen.II LT1, aluminum, reverse flow cooling, 175/68cc port volumes

10207643......94-96...350..........Gen.II LT1, aluminum, reverse flow cooling, 175/68cc port volumes

10208890......94-96...265..........Gen.II, L99, 4.3 Liter V-8, cast iron, reverse flow

10215339......97......350..........Gen.III, LS1, aluminum, 68cc

10225121......94-95...350..........LT5, ZR1, DOHC, 32-valve, drvs. side, aluminum

10225122......95......350..........LT5, ZR1, DOHC, 32-valve, pass. side, aluminum

10239902......96-up...350..........Gen.II LT4, aluminum, reverse flow cooling, 195cc port, 54.4cc chamber, angle plug

10239906......96-up...350.........."Vortec 5700", "L31", 64cc chamber, 170cc intake port, 1.94"/1.5" valves

12367712......99-up................"Fast Burn", aluminum, 210cc intake, port, 2.00/1.55 valves, 62cc chamber

12367713......99-up................"Fast Burn" used on ZZ430 crate motor, aluminum, 210cc intake

port, 2.00/1.55 valves, 62cc chamber

12480005......2000.................LS1 "GTZ", aluminum, 38cc, 2.125"/1.625" valves, angle plug

12480011......97-up................Bowtie "SB2.2", aluminum, 2nd version of "SB2", 48cc chambers, "mirror ports", revised valve angles & plug location

12506450......87-95...350

12509859......87-94...305

12516852......87-95...350

12529742......95-96...265..........Gen.II, "L99", cast iron

12551561......96......350..........Gen.II, "LT1", aluminum

12552520......97-up...305..........Vortec, truck

12554290......94-96...350..........Gen.II, "LT1", cast iron version, used on "9C1" Police package, Impala SS, Cadillac Fleetwood, Buick Roadmaster reverse flow cooling

12554291......95-96...265..........Gen.II, "L99", cast iron

12555690......96......350..........Gen.II, "LT4", aluminum

12556743......99......325..........Gen.III, 5.3L, aluminum, truck, van

12558059......97......305..........Vortec, truck, 1.84"/1.5" valves

12558062......98......350..........L31 Vortec, truck, 64cc chambers, 1.94/1.5, 170cc intake port

12558806......97-98...350..........Gen.III, "LS1", aluminum, 68cc

12559853......99-up...350..........Gen.III, "LS1", aluminum, 68cc

12559862......99-00................Gen.III, aluminum 4.8/5.3L

12559895......00-up...325..........Gen.III, aluminum, Vortec 5.3L

12561706......01-04................Gen.III, 5.3L, aluminum

12561873......99-01...364..........Gen.III, 71cc, iron

12562317......01-04...364..........Gen.III, 71cc, aluminum

12564241......00-up...350..........Gen.III, "LS1", aluminum, 68cc

12564243......01-up...350/364......Gen.III, "LS6", "LS2", aluminum

12572035......01-04...364..........Gen.III, 6.0L, aluminum, 71cc

14008856......79-81...267

14010201......82-85...305

14011034........................Bowtie, cast iron, 64cc chambers, 184cc port volume, angle plug, "Phase II" head

14011049........................Bowtie, aluminum, 55cc chambers, angle plug, 180cc ports, "Phase 6"

14011083......55-86...350..........Crate motor for years indicated. 285/300hp, 64cc chambers, 1.94"/1.5" valves

14014415......80-85...267/305

14014416......80-86...305..........1.84"/1.5" valves, 58cc chambers

14014440......80......305..........1.84"/1.5" valves

14019821......80-86...350

14019924......79-81...267

14019926......80-86...350

14010516......80-86...350

14020517......80......350

14020555......81......305

14020556......81......350

14022056......85......350

14022206......80......350

14022301......80-86...305

14022601......80-86...267/305......1.72"/1.5" or 1.84"/1.5" valves, 53cc chambers

14022801......80-86...305

14024816................350..........76cc chambers, 1.94/1.5 valves, Gen.I crate motors

14034806......78-82...267

14034807......78-86...305

14034808......80-86...350

14034808......96-up...350..........76cc chambers, 1.94"/1.5" valves, Gen.I Goodwrench crate motors

14034810......80-86...350..........Truck

14034811......80-86...350..........Truck

14039121......81-86...305..........Truck

14039122......81-86...305..........Truck

14071114......80-86...350

14075381......80-86...350..........Truck

14079261......86......350

14085844.......80-86..350..........Truck

14085963......86......350

14088526..............350..........Gen.II, LT1, aluminum

14089119......86-88...350

14094093......86-88...350

14096217......55-86...350..........Crate motor, 285hp/300hp, 64cc chambers, 72' or 90' center intake manifold bolt angles

14101081......87-95...305

14101083......87-up...350..........Gen.I, also used on crate motors, 285 or 300 hp, 64cc chambers, 72' center manifold bolt angles

14101128......86-87...350..........Aluminum, 58cc, angle plug

14102187......87-91...305..........1.84"/1.5" valves

14102191......87-up...350

14102193......87-up...305/350......1.94"/1.5" valves

22542525...........................Dart/Olds/Chevy aluminum, 14'or 17' race head.

24502559......96-97................Bowtie, "SB2", 1st version, "mirror ports", aluminum, 196cc port, CNC version 280cc port, 38cc chamber

25500141............................Buick/Chevy aluminum, 10' race head, 42cc chambers, symmetrical ports, 235cc intake port volumes, 2.1"/1.625" valves

25534351C....04-up................Gen.I Bowtie, cast iron Vortec head, 175/65cc ports, 2.00/1.55

valves, "small port head"

25534371C....04-up................Gen.I Bowtie, cast iron Vortec head, 206/77cc ports, 2.00/1.55 valves, "large port head"

33417369.....90-up...350..........Gen.I Goodwrench crate motor,"Hecho en Mexico", 76cc