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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	77-79	2 or 4, some Canadian assembled heavy duty blocks have 4-bolt main caps
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 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 or 4, some Canadian assembled heavy duty truck blocks have 4-bolt main caps
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	66-67	2
3896948	283	66-67	2
3903352	327	67	2
3914636	307	68	2
3914638	327	68	2 Truck
3914653	307	68-73	2
3914660	327	68	2
3914678	302	68	2 Z-28 Camaro
3914678	327	68	2
3914678	350	68	2
3931174	307	68	2 Truck
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
3933180	327	68-69	2
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	327	69	2 Trucks and industrial
3970010	350	69-80	2 or 4
3970014	350	70-76	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	92	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	96-98	2 Vortec truck, roller cam, one-piece rear seal
10243880	350	95-00	2 or 4 Vortec truck, Gen.I crate motors and "ZZ4", roller cam, one piece rear seal
12550592	350	97-up	crossbolted block, Gen.III, "LS1", aluminum
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
12560629	350	99	crossbolted block, Gen.III, "LS1", aluminum
12561168	350	01-up	crossbolted block, Gen.III, "LS1", aluminum
12562174	350	98-up	crossbolted block, Gen.III, "LS1", aluminum
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	2 or 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
14101147	305	85-up	2
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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