SBC Head Casting Numbers [Lookup & Full List]

You can learn here the Small Block Chevrolet engine’s special codes called SBC head-casting numbers. These codes have much information about the cylinder head’s features and origin.

Contents

In this article, you can take a close look at these numbers, and you can see how they help us tell Small Block Chevrolet engines apart.

Also, check LS Firing Order and Cylinder Numbers [Diagram]

How to Locate SBC Head, Casting Numbers

Lift The Hood:

Make sure that the engine is safe and cool. Open the hoop to get the engine top.

Find The Cylinder Head:

Find out which cylinder head it is. That’s the big metal part that sits above the engine block.

Look Near The Valve Cover:

The casting number is mostly located on the side of the head, close to the valve cover, on Small Block Chevrolet engines. Normally, it’s seen on the upper surface.

Clean The Area:

Smoothly remove any dirt or grime from the area using a brush or rag. The casting number will be simpler to read as a result.

SBC Head Casting Numbers

Find your SBC head casting number in the list to access the specific information you are looking for.

Casting numbers	Years	C.I.D.	Valves	Chamber Size	Notes
176450	75-76	262 – 305	1.71 / 1.5	N/A	N/A
330545	73	350	2.02/1.60	76cc	N/A
330862	71-73	400	1.94/1.50	N/A	N/A
330864	70-81	366/427/454	2.06/1.77	N/A	Open chamber Oval port
330865	70-84	366/427/454	2.06/1.77	N/A	Open chamber Oval port
330866	68-78	366/427	N/A	N/A	Oval Port Open chamber
330867	68-73	427	N/A	N/A	Oval Port Open chamber
333881	74-75	350	2.02/1.60	76cc	N/A
333882	74-80	350/400	N/A	76cc	N/A
336768	73-76	427	N/A	N/A	Oval Port Open chamber
336781	73-85	454	2.06/1.77	N/A	113cc Oval port
340292	70’s	N/A	N/A	64cc	angle plug, over the counter
343771	68-85	366/427/454	2.06/1.77	N/A	Open chamber Oval port
343772	76-84	366/427/454	2.06/1.77	N/A	Open chamber Oval port
343783	75-78	454	2.06/1.77	N/A	Open chamber Oval port
346236	75-87	454	2.06/1.77	N/A	113cc Oval port
346238	75-87	454	2.06/1.77	N/A	113cc Oval port
352625	70-76	454	N/A	N/A	Oval Port Open chamber
353049	70-73	454	2.06/1.77	N/A	113cc Oval port
354434	75-79	262/267/305	N/A	60cc	N/A
358741	76-79	305	N/A	N/A	N/A
359944	71-79	350	1.94/1.50	76cc	N/A
366765	73-84	427/454	2.06/1.77	N/A	Open chamber Oval port
367450	75-76	262	N/A	N/A	N/A
376445	77-85	350	N/A	76cc	N/A
376450	75-81	262/267/305	N/A	60cc	6 or 7 exhaust bolt holes
376455	77-85	350	N/A	N/A	N/A
376495	79	350	1.94/1.50	76cc	N/A
383882	71-73	400	N/A	N/A	N/A
399380	70-73	400	N/A	76cc	N/A
426424	72-82	305/350/400	1.72/1.50	N/A	N/A
458624	69-84	350	1.94/1.50	76cc	N/A
458642	75-84	350	N/A	N/A	N/A
460703	78-80	350	1.94/1.50	76cc	N/A
462614	77-79	305	N/A	60cc	N/A
462624	75-86	350/400	1.72/1.50; 194/1.50; 2.02/1.60	76cc	N/A
464033	76-86	350	1.94/1.50	76cc	N/A
464036	76-86	350	1.94/1.50	76cc	N/A
468642	76-up	350/400	N/A	N/A	N/A
471513	79	267/350	N/A	N/A	N/A
472424	76-79	305	1.72/1.50	N/A	N/A
473328	68-85	366	2.06/1.77	N/A	Open chamber Oval port
474213	78-82	305	1.72/1.50	N/A	N/A
474214	78-82	350	1.94/1.50	76cc	N/A
475590	78-82	400	1.94/1.50	76cc	N/A
517513	79	267/350	N/A	N/A	N/A
1816887	63	283	N/A	N/A	Made in “Canada” GMC Truck
3030817	74	400	N/A	N/A	2-bolt
3238882	68-69	350	1.94/1.50	76cc	N/A
3297185	57-67	307/327/350	1.72/1.50	N/A	N/A
3391635	68-76	305	N/A	N/A	N/A
3636839	55	265	N/A	N/A	N/A
3703523	55	265	1.72/1.50	N/A	195HP
3703524	55	265	N/A	N/A	N/A
3713358	55-56	265	N/A	N/A	N/A
3713569	55-56	265	N/A	N/A	N/A
3720991	56-57	265	N/A	N/A	N/A
3725306	56	265	N/A	N/A	N/A
3727185	69-73	307	N/A	N/A	N/A
3731262	56	265	1.72/1.50	N/A	Dual Quad Corvette
3731539	57	283	N/A	N/A	283 HP FI
3731544	57-61	283	N/A	N/A	N/A
3731548	57-62	283	N/A	N/A	N/A
3731554	57-62	283	N/A	N/A	N/A
3731556	57	283	N/A	N/A	N/AMade in “Canada” Truck
3731762	56	265	N/A	N/A	Vette 2×4 Carbs
3732791	58	348	N/A	N/A	N/A
3737465	60-61	283	N/A	N/A	N/A
3737739	57-62	283	N/A	N/A	283 and 283 Corvette F.I.
3737775	62-67	283/327	N/A	N/A	N/A
3740997	57	283	1.72/1.50	N/A	Dual Quad FI & 4-brl 220-270HP
3743056	58	283	N/A	N/A	N/A
3743096	62-67	327	N/A	N/A	GMC Truck
3747363	57-61	283	N/A	N/A	N/A
3747460	59-67	283/327	N/A	70cc	N/A
3748056	62-67	327	1.72/1.50	N/A	N/A
3748720	57-58	283	1.72/1.50	N/A	Dual Quad FI & 4-brl Corvette
3748770	58	283	N/A	N/A	N/A
3748772	58-61	283	N/A	N/A	N/A
3755537	57-62	283	N/A	N/A	N/A
3755538	59	283	1.72/1.50	N/A	250-290HP FI Corvette
3755539	58-62	283	N/A	N/A	N/A
3755549	57-62	283	N/A	N/A	N/A
3755550	59	283	N/A	N/A	N/A
3755585	62-67	327	N/A	N/A	GMC Truck
3755896	62-64	283	1.72/1.50	N/A	N/A
3756519	57-62	283	N/A	N/A	283 and 283 Corvette F.I.
3758379	59-61	348	N/A	N/A	N/A
3759256	58	348	N/A	N/A	N/A
3760116	59	283	1.72/1.50	N/A	Dual Quad FI & 4-brl Corvette
3767460	59-60	283	N/A	N/A	N/A
3767462	62-67	327	N/A	N/A	N/A
3767465	59-61	283	N/A	N/A	N/A
3767738	59-61	348	N/A	N/A	N/A
3767754	59-61	283	N/A	60cc	N/A
3767792	60-64	283	N/A	N/A	N/A
3770126	67-70	327/350	1.94/1.50	N/A	N/A
3773012	55	265	1.72/1.50	N/A	N/A
3774634	64-67	327	1.72/1.50	N/A	N/A
3774682	60-64	283/327	N/A	70cc	N/A
3774684	62-64	327	N/A	75cc	N/A
3774690	58	283	1.72/1.50		FI Corvette
3774692	58-64	283	N/A	60cc	N/A
3776434	64-67	327	N/A	N/A	N/A
3781147	60-61	348	N/A	N/A	High Perf
3782461	64-66	327	N/A	62cc	Camel hump, no accessory holes, 160/62cc port volumes
3782462	67	327	1.94/1.50	N/A	Corvette 2.02/1.60
3782870	62-67	327	N/A	N/A	327 and 327 Corvette
3782879	62-67	327	N/A	N/A	327 and 327 Corvette
3789817	62-67	327	N/A	N/A	327 and 327 Corvette
3789935	57-62	283	N/A	N/A	N/A
3790721	64-67	283	N/A	N/A	N/A
3792563	65-67	327	N/A	N/A	N/A
3795586	61	409	N/A	N/A	360HP
3795893	58-72	283 – 307 – 327	N/A	N/A	N/A
3795896	63-65	283	N/A	60cc	N/A
3796896	64-67	283	1.72/1.50	60cc	Chevy II
3798996	63-67	327	N/A	N/A	N/A
3814462	67	350	1.94/1.50	N/A	N/A
3814480	60-67	283/327	1.72/1.50	70cc	N/A
3814482	62-67	283/327/350	N/A	75cc	N/A
3814690	62-64	409	N/A	N/A	High Perf
3817680	63-67	283/327	N/A	N/A	N/A
3817681	62-67	327	N/A	N/A	N/A
3817682	61-62	283	N/A	N/A	N/A
3819333	62-65	348/409	N/A	N/A	N/A
3830817	63-65	409	N/A	N/A	340HP
3836839	55	265	N/A	N/A	N/A
3836842	57-67	283/327	N/A	N/A	N/A
3836924	63-64	283	1.72/1.50	N/A	N/A
3836942	58-62	283	1.72/1.50	N/A	N/A
3837063	58-62	283	1.72/1.50	N/A	N/A
3837064	56-62	265/283	N/A	N/A	N/A
3837065	55-56	265	N/A	N/A	Truck
3837731	63	409	N/A	N/A	High Perf Z-11
3837739	57	283	N/A	N/A	283 and 283 truck
3837775	62-67	283/327	1.72/1.50	N/A	N/A
3848720	57-58	283	N/A	N/A	N/A
3849820	65	327	1.72/1.50	N/A	N/A
3849852	57-67	283	N/A	N/A	N/A
3849935	65-67	283	N/A	N/A	N/A
3852172	62-64	327	N/A	N/A	N/A
3852583	65	409	N/A	N/A	400HP
3854520	62-67	283/327	1.72/1.50	N/A
3855961	68-76	350	N/A	N/A	2-bolt
3856206	65-66	396	2.06/1.77	98cc	Oval port
3856208	65	396	2.06/1.77	109cc	Z-16/L-37 Rectangular port
3856213	66-70	366	2.06/1.77	N/A	Closed chamber Oval port
3856260	68	396	N/A	N/A	Oval Port Closed chamber
3858174	65-67	327	N/A	N/A
3864812	57-67	283	N/A	N/A	283 and 283 truck
3867802	57-60	283	1.72/1.50	N/A	FI Corvette
3872702	66	396/427	2.06/1.77	98cc	Oval port L-34/L-35/L-36
3873064	56-57	265	1.72/1.50	N/A	N/A
3873858	66-67	396/427	2.06/1.77	109cc	L-78/L-72 Rectangular port
3876132	62-67	327	N/A	N/A	327 and 327 Corvette
3876487	71-73	350	1.94/1.50	76cc	N/A
3876775	60-67	283/327	N/A	75cc	N/A
3876875	66-70	427	2.06/1.77	N/A	Closed chamber Oval port
3878775	64-67	327	1.72/1.50	N/A	N/A
3884520	60-67	283	N/A	60cc	Some marked “Made in Canada,” also used by Studebaker
3890462	66-67	302/327/350	N/A	64cc	Camel hump, no accessory holes
3891462	62-67	302/327/350	1.94/1.50 2.02/1.60	64cc	N/A
3891492	64-67	327	1.94/1.50	N/A	N/A
3892657	65-67	327	N/A	N/A	N/A
3896944	65-67	283	N/A	N/A	N/A
3901068	87-up	350	N/A	64cc	Crate motor, 285HP
3904390	66-67	396/427	2.06/1.77	98cc	Oval port L-34/L-35/L-36
3904391	65-67	396/427	2.06/1.77	107cc	L-78/L-71/L-72 Rectangular port
3904392	67	427	2.19/1.88	106cc	L-88/L-89 Aluminum Rectangular port
3904393	66-68	366	2.06/1.77	N/A	Closed chamber Oval port
3908952	67	427	N/A	N/A	Oval Port Open chamber
3909802	66-67	396/427	2.06/1.77	100cc	Oval port L-34/L-35/L-36/L-68
3911011	68	327	N/A	N/A	N/A
3911032	68	307/327	N/A	70cc	N/A
3912264	58-62	283	N/A	N/A	N/A
3912265	63-64	283	N/A	N/A	N/A
3912291	68-70	302/327/350	1.94/1.50 2.02/1.60	64cc	Double humps
3912311	65-67	327	N/A	N/A	N/A
3912313	65-67	327	N/A	N/A	N/A
3914636	68-73	307	N/A	N/A	N/A
3914660	68-69	327	N/A	N/A	327 and 327 Corvette
3914678	68-69	327	N/A	N/A	327 and 327 Corvette
3917215	67-69	396/427	2.06/1.77	100cc	Oval port L-34/L-35
3917219	66-70	366/427	2.06/1.77	N/A	Closed chamber Oval port
3917264	67	302	2.02/1.60	N/A	64cc Z-28
3917290	67-68	307/327	N/A	N/A	N/A
3917291	67-68	302/327/350	N/A	64cc	Camel hump, no accessory holes
3917292	68	327/350	N/A	64cc	Camel hump
3917293	67-68	307/327	N/A	75cc	N/A
3919840	67-69	396/427	2.06/1.77	107cc	L-78/L-71/L-72 Rectangular port
3919842	68-69	396/427	2.19/1.88	106cc	L-88/L-89 Aluminum Rectangular port
3921175	66	327	1.94/1.50	N/A	N/A
3923441	67-76	350	1.94/1.50	76cc	N/A
3927185	69-76	307/327/350	N/A	70cc	N/A
3927186	69-70	302/350	N/A	64cc	Camel hump has accessory holes
3927187	69-70	350	N/A	64cc	Camel hump has accessory holes
3927188	69	327	N/A	74cc	N/A
3928454	68	307	1.72/1.50		N/A
3928455	68	302/327	2.02/1.60	64cc	325 & 350HP
3928494	68	327	2.02/1.60	64cc	350HP 4-bel
3928495	68	327	1.72/1.50	N/A	N/A
3931063	69-70	396/427	2.06/1.77	100cc	Oval port L-34/L-35
3931633	68-73	307	N/A	N/A	N/A
3931635	68-76	350	N/A	N/A	N/A
3931637	68-69	327	N/A	N/A	N/A
3931638	68	327	N/A	N/A	Truck
3931639	68	302	2.02/1.60	64cc	N/A
3932373	68-73	307	N/A	N/A	N/A
3932386	68-76	327 – 350	N/A	N/A	350 4-bolt and 327 Corvette
3932388	68-76	350	N/A	N/A	2-bolt
3932441	69-70	350	N/A	76cc	N/A
3932454	69-73	307	N/A	N/A	N/A
3932882	76	400	N/A	N/A	N/A
3933148	68-73	350	N/A	76cc	N/A
3933149	69-70	427	2.06/1.77	122cc	Oval port
3935401	68-76	427	N/A	N/A	Oval Port Open chamber
3941174	68	327	1.72/1.50	N/A	N/A
3946074	69-71	396/454	2.19/1.88	118cc	L-88/ZL-1 Aluminum Rectangular port
3946812	69	350	N/A	N/A	N/A
3946813	69-79	350	N/A	N/A	Truck
3947014	68-70	350	N/A	N/A	N/A
3947040	68	327	N/A	64cc	Right angle casting identifier, good HP head, used in trucks, no accessory holes
3947041	69-70	302/350	N/A	64cc	Right angle casting identifier, accessory holes, good HP head
3951509	74	400	N/A	N/A	2-bolt
3951511	70-73	400	N/A	N/A	4-bolt
3951598	70	400	N/A	76cc	N/A
3956618	68-76	350	N/A	N/A	4-bolt
3958618	68-76	350	N/A	N/A	2-bolt
3961598	70-76	400	1.94/1.50	76cc
3964280	66-70	427/454	2.06/1.77	N/A	Closed chamber Oval port
3964286		350	N/A	N/A	N/A
3964290	69-70	396/402/427/454	2.06/1.77	100cc	Oval port
3964291	69-70	396/402/427/454	2.19/1.88	108cc	L-78/L-71/L-72/LS-6 Rectangular port 325cc intake
3964292	70	454	2.19/1.88	109cc	LS-6 Rectangular port
3965198	69	396	2.06/1.77	N/A	Open chamber Oval port
3965742	70	350	N/A	N/A	over the counter, angle plug L98 style
3970010	68-76	350	N/A	N/A	4-bolt
3970020	68-73	307	N/A	N/A	N/A
3970126	67-71	327/350	N/A	N/A	N/A
3970721	64-67	283	N/A	N/A	N/A
3971293	68-69	307 – 327	N/A	N/A	N/A
3973195	71-73	400	1.94/1.50	76cc	N/A
3973370	69-70	350	N/A	64cc	over the counter in the US, Canadian 350/300hp production use in Pontiac, straight or angle plug
3973414	70	350	N/A	64cc	Camel Hump, LT1-350/370hp
3973487	71-72	350	1.94/1.5; 2.02/1.6	75cc	was also used on ’71 350/330hp LT1
3973493	71-72	400	N/A	76cc	N/A
3975950	68-70	366/427	2.06/1.77	N/A	Closed chamber Oval port
3981462	62-67	302-327-350	N/A	N/A	N/A
3986133	70-85	366/427	2.06/1.77	N/A	Closed chamber Oval port
3986136	70-84	366/427	2.06/1.77	N/A	Closed chamber Oval port
3986316	71	350	N/A	76cc	N/A
3986330	69-79	350	1.94/1.50	76cc	N/A
3986336	71	350	N/A	76cc	N/A
3986339	71	307/350	N/A	74cc	N/A
3986388	68-76	307/350	N/A	N/A	N/A
3990941	68-82	307/350	N/A	N/A	N/A
3991492	70	350	N/A	64cc	LT1, Camel hump, accessory holes, straight plug
3993820	71	402/454	2.06/1.77	113cc	Oval port
3994025	71	454	2.19/1.88	118cc	LS-6 Rectangular port
3994026	71	454	2.19/1.88	118cc	LS-6 Rectangular port
3997417	71	307	1.72/1.50	N/A	N/A
3998916	72	350	N/A	76cc	also used w/’72 350 LT1, big valve, screw-in studs
3998920	72-73	350	N/A	N/A	N/A
3998991	72-73	307/350	N/A	75cc	N/A
3998993	72-73	307/350	N/A	75cc	N/A
3998997	72-73	350/400	N/A	76cc	76cc chambers
3999241	72	402/454	2.06/1.77	113cc	Oval port
4079261	75	350	N/A	N/A	N/A
6258723	71	454	2.19/1.88	118cc	LS-6 Rectangular port
6259425	68-76	350	N/A	N/A	2-bolt
6259515	73	350	N/A	N/A	N/A
6260855	73-75	350	1.94/1.50	76cc	N/A
6260856	73-76	350	1.94/1.50	76cc	N/A
6272070	73	350	N/A	N/A	N/A
6272292	71	402/454	2.06/1.77	N/A	Open chamber Oval port
6272990	71-94	454	2.19/1.88	118cc	Replacement Rectangular port 325cc intake
10033867	N/A	N/A	N/A	62cc	Aluminum, over-the-counter Pontiac 23′ head, angle plug, 196cc intake port
10045427	N/A	N/A	N/A	N/A	Pontiac/Chevy Aluminum, 91cc chamber Large Rectangle Port
10045434	N/A	N/A	N/A	55cc	Aluminum, Over the counter Pontiac 15′ head, angle plug, raised runner, “rollover” head
10049875	N/A	N/A	N/A	N/A	Pontiac/Chevy Aluminum Small Rectangle port
10051101	N/A	N/A	N/A	55cc	Aluminum, Bowtie, angle plug, raised runner, 196cc intake port
10051128	90-94	454	2.19/1.88	72cc	Bowtie Aluminum Rectangular port 400cc intake
10052902		427	N/A	N/A	Oval Port Open chamber
10065202	87-95	350	N/A	N/A	Truck
10065203	87-95	350	N/A	N/A	Truck
10065204	87-95	350	N/A	N/A	N/A
10065205	87-95	305	N/A	N/A	N/A
10065206	87-95	350	N/A	N/A	N/A
10065207	87-95	305	N/A	N/A	N/A
10088113	88-up	350	194/1.50	58cc	Aluminum, angle plug, raised “D” port exhaust
10093328	N/A	N/A	N/A	61cc	Aluminum, Over the counter Pontiac 15′ head, 224cc ports, “roll over” head
10101136	91-94	454	2.06/1.77	N/A	Open chamber Oval port
10101140	91-01	366/427	N/A	N/A	Oval Port Closed chamber
10106178	90	350	N/A	N/A	Aluminum, LT5, ZR1, DOHC, 32-Valve, pass. Side.
10106179	90	350	N/A	N/A	Aluminum, LT5, ZR1, DOHC, 32-Valve, drivers Side.
10110810	91-up	350	N/A	65cc	Gen. 1
10114156	91-01	454	N/A	N/A	Oval Port Open chamber
10120928	87-95	350	N/A	N/A	N/A
10121033	78-88	454	2.06/1.77	N/A	Open chamber Oval port

FAQs

How do I identify my SBC engine?

To identify your Small Block Chevrolet (SBC) engine, locate the engine block’s stamped serial number, mostly found on the right side of the engine block, just below the cylinder head. Cross-reference this number with a reliable resource.

Where can I find block-casting numbers?

Mostly found on the back of the engine block, close to the bell housing, are block casting numbers. They can also be located directly below the cylinder head on the driver’s side of the block.

Where can I find block-casting numbers?

Mostly found on the back of the engine block, close to the bell housing, are block casting numbers. They can also be located directly below the cylinder head on the driver’s side of the block.

What is the casting number identification?

An engine block or cylinder head, for example, may have a different alphanumeric code on it that is known as the casting number identification. It acts as a key to extract particular information regarding the manufacturing, compatibility, and design of the component.

How to Locate SBC Head, Casting Numbers

Lift The Hood:

Find The Cylinder Head:

Look Near The Valve Cover:

Clean The Area:

SBC Head Casting Numbers

FAQs

How do I identify my SBC engine?

Where can I find block-casting numbers?

Where can I find block-casting numbers?

What is the casting number identification?

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