• CSB - Toppar


    CASTING#....YEAR....ENGINE 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 features
    it 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