CASTING# SIZE YEAR MAIN CAP BOLTS NOTES 340029 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 70-73 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 62-67 2 Was also used for some replacement blocks 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 69-73 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 or 4 Bowtie, 3 75"-4 30" bores, 1 or 2-piece rear seal 10051184 4 Bowtie, 4 00"-4 155" bores, 1 or 2-piece rear seal 10054727 350 86-up 2 or 4 one piece rear seal, some "Made in Canada" 10066036 350 2 or 4 Target Master/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 10168588 265 94-96 2 L99, Gen II, 4 3 Liter V-8, Caprice, reverse flow cooling 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 95-00 2 or 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 80-85 2 14010202 305 80-85 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 14016383 305 80-85 2 Truck 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 14094766 305 86-up 2 One-piece rear seal 14101148 350 87-90 4 One-piece rear seal 14102058 305 87-91 2 Roller cam, one-piece rear seal 22551656 4 Rocket block, 4 00"-4 190" bores, 2 45" main journal sizes, splayed caps, dry sump,
2-piece rear seal, 9 025" deck
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