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CHEVY V-8 CASTING NUMBERS

SMALLBLOCK V-8 CASTING NUMBERS

SBC BLOCKS
CASTING#.....SIZE...YEAR...MAIN CAP BOLTS....NOTES

140029.....350...80-84...2 330817.....400...72-80...2 355909.....262.....75....2 355909.....305...76-79...2 360851.....262...75-76...2...Monza V-8 361979.....305...78-79...2 366245.....350...78-79...2 366286...................4...Bowtie, Aluminum, siamesed,                              straight nodular iron main                               caps, 2-piece seal, 4.00-4.150"                              bores, 2.45" main journals 366287...................4...Bowtie, Aluminum, siamesed,                              straight nodular iron main                               caps, 2-piece seal, 4.00-4.150"                              bores, 2.45" main journals 366299...................4...Bowtie, Aluminum, nodular                              iron splayed caps, wet sump,                              4.00" bore 389257.....302.....67....2 393288.....283...65-67...2 460703.....350.....78....4 460776.....305...78-79...2 460777.....305...78-79...2 460778.....305...78-79...2 471511.....267...79-82...2 3556519....283...58-61...2 3703524....265.....55....2...No oil filter 3720991....265...56-57...2 3731548....265...57......2...No side motor mounts 3731548....283...57......2...No side motor mounts 3737739....283...58-64...2 3756519....283...58-62...2 3782870....327...62-67...2 3789817....283...62-64...2 3789817....327...62-67...2 3789935....283...61-64...2 3790721....283...62-64...2...Chevy II recessed oil filter boss 3790721....327...65-66...2...Chevy II recessed oil filter boss 3791362....327...62-67...2...Chevy II recessed oil filter boss 3792563....327.....65....2 3792582....283...64-65...2 3794226....283...58-63...2 3794460....327...62-64...2 3814660....327...68-69...2 3830944....327.....63....2 3834810....283...64-66...2 3834812....283...62-63...2 3837739....283...58-62...2 3849852....283...57-66...2 3849935....283...65-67...2 3858174....327...64-67...2 3858180....327...64-67...2 3858618....350...68-76...2 3862194....283...65-67...2...Chevy II recessed oil filter boss 3862812....283...62-64...2 3892657....302.....67....2...Z-28 Camaro 3892657....327.....67....2 3892657....350.....67....2...Camaro 3896944....283.....67....2 3896948....283...66-67...2 3903352....327.....67....2 3914636....307.....68....2 3914653....307...68-73...2 3914660....327.....68....2 3914678....302.....68....2...Z-28 Camaro 3914678....327.....68....2 3914678....350.....68....2 3932371....307...69-73...2 3932373....307...68-73...2 3932386....302.....69....4...Z-28 Camaro 3932386....327.....69....2 3932386....350.....69....4 3932388....350.....69....2 or 4 3951509....400...70-71...4 3951509....400...74-80...2 3951511....400...70-72...4...Some replacement blocks had 2-bolt main caps 3956618....302.....69....4...Z-28 Camaro 3956618....327...68-69...2 3956618....350.....69....2 or 4 3956632....307.....69....2 3959512....327...62-63...2 3970010....302.....69....4...Z-28 Camaro 3970010....350...69-80...2 or 4 3970014....350...70-75...2 or 4 3970020....307...70-73...2 3970024....307...69-71...2 4715111....305.....80....2 6259425....350...69-76...2 10036033...350...........4...Goodwrench crate motor, 2-piece rear                              seal, "Hecho en Mexico" 10051182.................2...Bowtie, 3.75"-4.30" bores, 1-piece rear seal 10051184.................4...Bowtie, 4.00"-4.160" bores, 1-piece rear seal 10054727...350...86-up...2 or 4...one piece rear seal, some "Made in Canada" 10066036...350...........4...Goodwrench crate motor, 2-piece rear                              seal, "Hecho en Mexico" 10066038...350.....94....4...Goodwrench crate motor, 2-piece rear                              seal, "Hecho en Mexico" 10090511...350.....90....2...LT-5, ZR1 Vette, 375hp 10125327...350...92-up...2 or 4...Gen.II LT-1, reverse flow cooling 10125327...350...96-up...2 or 4...Gen.II LT-4, reverse flow cooling 10134996.................4...Bowtie, Aluminum, 4.125" bore                              2.65" main journals 10153558...350...91-92...4...LT-5, ZR1 Vette, 375hp 10199001...350...93-95...4...LT-5, ZR1 Vette, 405hp 10243878...305...96-97...2...Vortec truck, roller cam, one-piece rear seal 10243880...350...95-99...4...Gen.I crate motors and "ZZ4", roller cam, one piece rear seal 12550592...350...97-up...crossbolted block, Gen.III, "LS1" 12559846...350...98-up...crossbolted block, Gen.III, "LS1" 12560621...350...98-up...crossbolted block, Gen.III, "LS1" 12562174...350...98-up...crossbolted block, Gen.III, "LS1" 14010201...305...80-84...2 14010202...305...80-84...2 14010203...305...80-85...2 14010207...350...80-85...2 or 4 14010209...350...80-85...4 14010280...267...79-82...2 14011064...350...83......4 14011148...350...87-89.......Roller cam, one-piece rear seal 14016376...267...79-82...2 14016379...350...77-79...2 or 4 14016381...305...80-84...2 14016382...305...79-84...2 14079287...350...86-90.......Truck 14088526...350...87-89.......Roller cam, one-piece rear seal 14088548...350...86-88...2 or 4 14088551...305...86-87...2...one-piece rear main seal 14093627...305...87-91...2...Roller cam, one-piece rear seal 14093638...350...87-95...2 or 4...Roller or flat tappet cam                                   one-piece rear seal 14101148...350...87-90...4...One-piece rear seal 14102058...305...87-91...2...Roller cam, one-piece rear seal


SBC HEADS


330545.....73......350..........76cc, 2.02/1.60
333881.....74-75...350..........76cc, 2.02/1.60
333882.....74-80...350/400......76cc
340292.....70's.......Over the counter, angle plug, 64cc
354434.....75-79...262/267/305
358741.....76-79...305
376450.....75-81...262/267/305..6 or 7 exhaust bolt holes
376455.....77-85...350
462624.....75-86...350/400......76cc chamber
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
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
3767462....62-67...327
3767465....59-61...283
3767754....59-61...283
3767792....60-64...283
3770126....69......327
3774682....60-64...283/327
3774684....62-64...327
3774692....58-64...283
3782461....64-66...327..........camel hump, no accessory holes,
                                160/62cc port volumes
3782461X...60-63...283/327......camel hump, no accessory holes,
                                slightly larger 172/64cc port volumes
3795896....63-65...283
3795896....62-64...327
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
3884520....66-67...283..........Some marked "Made in Canada",
                                60cc chamber, also used by Studebaker
3890462....66-67...302/327/350..Camel hump, no accessory holes
3901068....87-up...350..........Crate motor, 285hp, 64cc chamber
3911032....68......307/327
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
3917292....68......327/350......Camel hump
3917293....68......307/327......75cc chambers
3927185....69-70...307/327......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, accessory holes, good HP head
3951598....70......400..........76cc chambers
3964286............350
3965742....70......350..........over the counter, angle plug
3970126....67-70...327/350
3973370....69-70...350..........over the counter, 64cc, straight or angle plug
3973414....70......350..........LT1-370hp, Camel hump, 64cc
3973487....71-72...350..........used on 71-72 350 LT1, 75cc
3973487X...71-72...350..........75cc
3973493....71......400..........76cc
3986316....71......350..........76cc
3986336X...........350..........76cc
3986388....68-76...307/350
3986339....71......307/350......74cc
3986339X...71......307/350......74cc
3991492....70......350..........LT1, Camel hump, accessory holes
                                64cc, straight plugs
3991492....70-up................over the counter, Camel hump,
                                64cc, straight or angle plugs
3998916....72......350..........also used w/'72 350 LT1,
                                big valves, screw in studs
3998920....72-73...350
3998991....72-73...307/350......75cc
3998993....72-73...307/350......75cc
3998993....current..350.........Goodwrench crate motors,
                                "Hecho en Mexico"
3998997....72-73...350/400......76cc
3998997....78-84...305/350......76cc
4079261....75......350
10033867........................Over the counter Pontiac 23' head
                                62cc, angle plug, 196cc intake
                                port, aluminum
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
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...93-up...350..........Gen. 1
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 features
                                it may have.  There are at least 6
                                different versions as of 11/99.
10147898...95-96...350..........Gen.I crate motor
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
10215339...97......350..........Gen.III, "LS1", aluminum
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
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
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
12555690...96......350..........Gen.II, "LT4", aluminum
12558059...97......305..........Vortec, truck, 1.84"/1.5" valves, 64cc chamber
12558062...98......350..........L31 Vortec, truck, 64cc chambers, 1.94/1.5, 170cc intake port
12558806...97-98...350..........Gen.III, "LS1", aluminum
12559853...99......350..........Gen.III, "LS1", aluminum
14094093...86-88...350
14010201...84......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
14014440...80......305..........1.84"/1.5" valves
14020517...80......350
14020555...81......305
14020556...81......350
14022056...85......350
14022601...80-86...267/305......1.84"/1.5" valves, 58cc chambers
14022801...80-86...305
14034808...96-up...350..........76cc chambers, 1.94"/1.5" valves, Goodwrench crate motors
14071114...80-85...350
14079261...86......350
14085963...86......350
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...87-91...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...305/350
14102193...87-up...305/350
24502559...96-97................Bowtie, "SB2", 1st version,
                                "mirror ports", aluminum, 196cc port, CNC version 280cc port, 38cc chamber
25500141........................Buick/Chevy aluminum 10' head,
                                42cc chambers, symmetrical ports, 
                                235cc intake port volumes, 
                                2.1"/1.625" valves
33417369...90-up...350..........Gen.I Goodwrench crate motor,
                                "Hecho en Mexico", 76cc
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