Chevy Small Block V8 Engine Block Casting Numbers
CASTING#.....SIZE...YEAR...MAIN CAP BOLTS....NOTES

140029.....350...80-84...2 Bolt Main
330817.....400...73-76 Passenger 75-80 Truck..2 Bolt Main
355909.....305...78-79 Passenger 76-79 Truck
355909.....305...76-79...2 Bolt Main
360851.....262...75-76...2 Bolt Main...Monza V-8
361979.....305...76-79...Passenger 76-79 Truck 2 or 4, Bolt Main
366245.....350...78-79...Passenger
366286...................4 Bolt Main...Bowtie, 2-piece seal, 4.00-4.150" bores, 2.45" main journals
366298...................4 Bolt Main...Bowtie, 3.398" bore with sleeves, two piece rear main seal.
366299...................4 Bolt Main...Bowtie, 4.00" bore
389257.....302.....67....2 Bolt Main
393288.....283...65-67...2 Bolt Main
460703.....350.....78....4 Bolt Main
460776.....305...78-79...Passenger 2 Bolt Main
460776.....305...78-79 Truck 2 Bolt Main
460777.....305...78-79...2 Bolt Main
460778.....305...78-79...2 or 4, Bolt Main,
471511.....267...79-82...2 Bolt Main
3556519....283...58-61...2 Bolt Main
3703524....265.....55....2 Bolt Main...No oil filter 55 Corvette 195 Hp
3720991....265...56-57...2 Bolt Main
3731548....265...57......2 Bolt Main...No side motor mounts
3731548....283...57......2 Bolt Main...No side motor mounts
3737739....283...58-64...2 Bolt Main
3756519....283...58-62...2 Bolt Main
3782870....327...62-67...2 Bolt Main
3789817....283...62-64...2 Bolt Main
3789817....327...62-67...2 Bolt Main
3789935....283...61-64...2 Bolt Main
3790721....283...62-64...2 Bolt Main...Chevy II recessed oil filter boss
3790721....327...65-66...2 Bolt Main...Chevy II recessed oil filter boss
3791362....327...62-67...2 Bolt Main...Chevy II recessed oil filter boss
3792563....327.....65....2 Bolt Main
3792582....283...64-65...2 Bolt Main
3794226....283...58-63...2 Bolt Main
3794460....327...62-64...2 Bolt Main
3830944....327.....63....2 Bolt Main
3834810....283...64-66...2 Bolt Main
3834812....283...62-63...2 Bolt Main
3837739....283...58-62...2 Bolt Main
3849852....283...57-66...2 Bolt Main
3849935....283...65-67...2 Bolt Main
3858174....327...64-67...2 Bolt Main
3858180....327...64-67...2 Bolt Main
3858618....350...68-76...2 Bolt Main
3862194....283...65-67...2 Bolt Main...Chevy II recessed oil filter boss
3862812....283...62-64...2 Bolt Main
3892657....302.....67....2 Bolt Main...Z-28 Camaro
3892657....327.....67....2 Bolt Main
3892657....350.....67....2 Bolt Main...Camaro
3896944....283...66-67...2 Bolt Main
3896948....283...66-67...2 Bolt Main
3903352....327.....67....2 Bolt Main
3914636....307.....68....2 Bolt Main
3914638....327.....68....2 Bolt Main...Truck
3914653....307...68-73...2 Bolt Main
3914660....327.....68....2 Bolt Main
3914678....302.....68....2 Bolt Main...Z-28 Camaro
3914678....327.....68....2 Bolt Main
3914678....350.....68....2 Bolt Main
3931174....307.....68....2 Bolt Main...Truck
3932371....307...69-73...2 Bolt Main
3932373....307...68-73...2 Bolt Main
3932386....302.....69....4 Bolt Main...Z-28 Camaro
3932386....327.....69....2 Bolt Main
3932386....350.....69....4 Bolt Main
3932388....327.....69....2 Bolt Main
3932388....350.....69....2 or 4 Bolt Main
3933180....327...68-69...2 Bolt Main
3951509....400...70-71...4 Bolt Main
3951509....400...74-80...2 Bolt Main
3951511....400...70-73...4 Bolt Main...Some replacement blocks had 2-bolt main caps
3956618....302.....69....4 Bolt Main...Z-28 Camaro
3956618....327...68-69...2 Bolt Main
3956618....350.....69....2 or 4 Bolt Main
3956632....307.....69....2 Bolt Main
3959512....327...62-67...2 Bolt Main...Was also used for some "CE" replacement blocks
3959532....283...64......2 Bolt Main...Used for some "CE" replacement blocks
3970010....302.....69....4 Bolt Main...Z-28 Camaro
3970010....327.....69....2 Bolt Main...Trucks and industrial
3970010....350...69-80...2 or 4 Bolt Main
3970014....350...70-76...2 or 4 Bolt Main
3970020....307...70-73...2 Bolt Main
3970024....307...69-73...2 Bolt Main
4715111....305.....80....2 Bolt Main
6259425....350...69-76...2 Bolt Main
10036033...350...........4 Bolt Main...Goodwrench crate motor, 2-piece rear seal,
10046164...305.....86....2 Bolt Main
10051182.................2 or 4 Bolt Main...Bowtie, 3.75"-4.30" bores, 1 or 2-piece rear seal
10051184.................4 Bolt Main...Bowtie, 4.00"-4.155" bores, 1 or 2-piece rear seal
10054727...350...86-up...2 or 4 Bolt Main...one piece rear seal
10066036...350...........2 or 4 Bolt Main...Target Master/Goodwrench crate motor, 2-piece rear seal
10066038...350.....92....4 Bolt Main...Goodwrench crate motor, 2-piece rear seal,
10090511...350.....90....2 Bolt Main...LT-5, ZR1 Vette, 375hp
10125327...350...92-up...2 or 4 Bolt Main...Gen.II LT-1, reverse flow cooling
10125327...350...96-up...2 or 4 Bolt Main...Gen.II LT-4, reverse flow cooling
10134996.................4 Bolt Main...Bowtie, Aluminum, 4.125" bore 2.65" main journals
10153558...350...91-92...4 Bolt Main...LT-5, ZR1 Vette, 375hp
10168588...265...94-96...2 Bolt Main...L99, Gen.II, 4.3 Liter V-8, Caprice, reverse flow cooling
10199001...350...93-95...4 Bolt Main...LT-5, ZR1 Vette, 405hp
10243878...305...96-98...2 Bolt Main...Vortec truck, roller cam, one-piece rear seal
10243880...350...95-00...2 or 4 Bolt Main...Vortec truck, Gen.I crate motors and "ZZ4", roller cam, one piece rear seal
12550592...350...97-up...crossbolted block, Gen.III, "LS1", aluminum
12551354...364...02-up...crossbolted cast iron Gen. III, 6.0L, truck
12559378...350...99-up...crossbolted block, Gen.III, "LS1", aluminum
12559846...350...98-up...crossbolted block, Gen.III, "LS1", aluminum
12560621...350...98-up...crossbolted block, Gen.III, "LS1", aluminum
12560626...350...99-up...crossbolted block, Gen.III, "LS1", aluminum
12560629...350...99......crossbolted block, Gen.III, "LS1", aluminum
12561168...350...01-up...crossbolted block, Gen.III, "LS1", aluminum
12561358...293...99-up...Gen.III, Used with 4.8L motors
12561358...325...99-up...Gen.III, used with 5.3L motors
12562174...350...98-up...crossbolted block, Gen.III, "LS1", aluminum
12577396.........02-up...Gen.III, 4.8L or 5.3L, cast iron, truck
14010201...305...80-85...2 Bolt Main
14010202...305...80-85...2 Bolt Main
14010203...305...80-85...2 Bolt Main
14010207...350...80-85...2 or 4 Bolt Main
14010209...350...80-85...2 or 4 Bolt Main
14010280...267...79-82...2 Bolt Main
14011064...350...83......4 Bolt Main
14011148...350...87-89.......Roller cam, one-piece rear seal
14016376...267...79-82...2 Bolt Main
14016379...350...77-79...2 or 4 Bolt Main
14016381...305...80-84...2 Bolt Main
14016382...305...79-84...2 Bolt Main
14016383...305...80-85...2 Bolt Main...Truck
14079287...350...86-90.......Truck
14088526...350...87-89.......Roller cam, one-piece rear seal
14088548...350...86-88...2 or 4 Bolt Main
14088551...305...86-87...2 Bolt Main...one-piece rear main seal
14093627...305...87-91...2 Bolt Main...Roller cam, one-piece rear seal
14093638...350...87-95...2 or 4 Bolt Main...Roller or flat tappet cam one-piece rear seal
14094766...305...86-up...2 Bolt Main...One-piece rear seal
14101147...305...85-up...2 Bolt Main
14101148...350...87-90...4 Bolt Main...One-piece rear seal
14102058...305...87-91...2 Bolt Main...Roller cam, one-piece rear seal
22551656.................4 Bolt Main...Rocket block, 4.00"-4.190" bores, 2.45" main journal sizes, splayed caps, dry sump, 2-piece rear seal, 9.025" deck.