Chevy Big Block Casting Numbers and Data

There is a lot of misinformation on the internet about these numbers. We have taken the time to verify the data as much as possible. There still may be errors. Please lets us know if you find one.

Tall Deck = 10.2" Height.
1991 and later Gen.V - VII Engines have 1 piece seals.

Big Blocks

Number	C.I.D.	M-Blts	Year	HP	Description
326711		4			Alum., CanAm, 4.44" Bore, Steel Liners
340220	427	4	68-85		Tall Deck, Truck
345014	454		70-86		Truck
346236	454	2	75-76
359070	454		70-90		Truck
361959	454	2 or 4	73-90		Passenger
361959	454		75-85		Truck LD
364776	427	4	68-85		Tall Deck, Truck HD
364779	366	4	68-90		Tall Deck, Truck HD
399204	509	4	70-71		Alum., CanAm, 4.5" Bore, Steel Liners
399293	366	4	77-78		Tall Deck
473478	427	4	77-90		Tall Deck, Truck HD
495102		4			Alum. CanAm, 4.5" Bore
3732811	348		58		Passenger
3751872	348		58		Passenger
3755011	348		59-61		Passenger
3771705	348		59-61		Truck, Replacement
3782870	427	4	68-76		Tall Deck, Truck
3788068	409		62		Passenger
3795623	409		61		Passenger
3798962	348		62-65		Truck, Replacement, X on side
3824553	366	4	66-67		Tall Deck
3830814	409		63		Passenger, X on side
3844422	409		64		Passenger, X on side
3855961	396	2 or 4	65-66	325	Passenger
3855961	427	2 or 4	66	390-425	Vett
3855961	396	2 or 4	66	325-375	Chevelle
3855961	396	2 or 4	68-69		Truck LD
3855962	396	2 or 4	65-66
3855962	396	2	68-69		Passenger, Chevelle
3855977	366	4	66-73		Tall Deck
3857655	348		62-65		Truck
3857656	409		65		Passenger
3869942	427	2 or 4	66-67	390-425	Passenger, Vett
3873858	396		66
3902406	396	2 or 4	67		Chevelle
3902466	396		66-69		Passenger, Chevelle, Nova, Camaro
3904351	427	2 or 4	67	385-435	Passenger, Vett
3904354	366	4	66-67		Tall Deck, Truck
3916319	366	4	68-85		Tall Deck, Truck HD
3916321	427	2 or 4	68		Passenger, Vett
3916323	396	2 or 4	68	325-375	Passenger, Camaro, Chevelle, Nova
3925521	427	4	68-85		Tall Deck, Truck HD
3935439	427	2 or 4	68-69	430-435	Vett
3935440	396	2 or 4	68-69		Passenger, Chevelle, Camaro, Nova
3937724	366	4	68-85		Tall Deck, Truck HD
3937726	427	4	68-84		Tall Deck, Truck HD
3946052	427	4	69		Alum., ZL-1, Mark IV
3946053	427	4	97+		Alum., ZL-1, 2nd Version, Mark IV
3955270	427	2 or 4	69	390-435	Vett
3955270	427	2 or 4	69	385-425	Passenger
3955272	402	2 or 4	69
3955272	396	2 or 4	69		Passenger, Chevelle, Camaro, Nova, Truck LD
3955272	396	2 or 4	70-72		Truck LD
3955274	366	4	68-85		Tall Deck, Truck HD
3955276	427	4	68-73		Tall Deck, Truck HD
3963512	427	2 or 4	68-69	385-425	Passenger, Chevelle, Camaro, Vett
3963512	454	2 or 4	70-71	360-390	Passenger, Vett
3963512	454	2 or 4	70	450	Chevelle LS6
3963512	454	2 or 4	70-76		Passenger, Chevelle, Monte Carlo
3963512	454	2 or 4	71	365-425	Vett
3963513	454		73-76		Passenger, Chevelle
3968854	396		68-69		Truck, Passenger, Chevelle, Nova, Camaro
3968854	402		70-72		Truck, Passenger, Chevelle, Nova, Camaro
3969851	366		68-85		Truck HD
3969852	366	4	68-84		Tall Deck, Truck HD
3969854	396	2 or 4	69-72
3969854	402	2 or 4	70-72		Truck, Passenger, Chevelle, Nova, Camaro
3969854	454		69-72
3969858	427	4	68-84		Tall Deck, Truck HD
3995623	409		61		Passenger
3999289	454	2 or 4	71-79		Passenger, Vett, Chevelle, Truck
3999290	396	2 or 4	68-69		Truck LD
3999290	402	2 or 4	70-72		Truck LD, Passenger, Chevelle, Nova, Camaro
3999290	402	2 or 4	72		Passenger, Chevelle, Camaro, Nova
3999293	366	4	68-85		Tall Deck, Truck HD
3999293	454		73-75		Passenger, Chevelle
3999294	427	4	68-84		Tall Deck, Truck HD
6272177	402		70-73
10051107	454	4			Bowtie, Mark IV, 9.8" Deck, Siamesed Bore
10069282	366	4	90-91		Tall Deck, Mark IV
10069284	427	4			Tall Deck, Mark IV
10069286	454	4	90-91		Mark IV
10114182	454	4	91-95		Gen.V
10114183	366	4	91+		Tall Deck, Gen.V
10114184	427	4	91-92		Tall Deck, Gen.V
10134366	454	4			Bowtie, Tall Deck, Gen.V
10185050	454	4			Bowtie, Gen.V
10237297	454	4	96+		Vortec, L-29, Gen.VI
10237299	427	4	96+		Tall Deck, Gen.VI, 7.0L, Truck
10237300	502	4	96+		Gen.VI, 4.466" Bore
12550312	427	4	96+		Tall Deck, Gen.VI, 4.25" Bore, Fuel Pump Boss, Clutch Linkage Boss
12550313	454	4	91+		Gen.V Crate Motor, Gen.VI 4.25" Bare Block, Fuel Pump Boss
12556110	496	4	01+		Gen.VII 8.1L, Vortec 8100, Truck
12561357	454	4	96+		Gen.VI
12561358	502	4			Gen.VI
14015443	454	2 or 4	87-90		Mark IV, Truck, Motorhome
14015445	454	2 or 4	78-90		Truck LD
14044807	454	4			Tall Deck, Bow Tie, Mark IV, 4.25" or 4.495 Bore
14096859	502	4			Gen.V, HO
24502504	454	4			Bowtie, Gen.V, Race Prep.
24502506	454	4			Tall Deck, Bowtie, Gen.V, Race Prep.
24502572		4			4.5 bore, Olds DRCE 2
25534402		4			4.59" Bore, Olds DRCE 3