CASTING #'S

SMALL BLOCK CASTING NUMBERS

These are the 'main stream' castings for small block Chevy engines. We realize that not all components are listed so we may add to the listing in the future. For now..this is what we came up with. IN SOME CASES THERE WILL BE MORE THAN ONE CHART.

Casting #	Years made	Size	HP levels used for	Notes
3970010	69 - 79	350 only	145 - 375	2&4-Bolt main caps.
3970014	68 - 79	350 only	200 & 255	2&4-Bolt main caps.
366245	78 - 82	350 only	N\A	4-Bolt main Bowtie High Tin
14011064	82 - 86	350 only	N\A	4-Bolt main Bowtie High Tin
3914678	68 - 79	350, 327 &: 302	210 - 350	2-Bolt main caps.
3858180	64 - 67	327 only	250-375	2-Bolt main caps.
3892657	64 - 67	350, 327 & 302	210-350	2-Bolt main caps.
3782870	62 - 67	327 only	250-375	2-Bolt main caps.
3789935	61 - 66	283 only	230-315	2-Bolt main caps.
3737739	57 - 629	283 only	220-290	2-Bolt main caps.
3951509	70 - 80	400 only	150-265	2&4-Bolt main caps.
3951511	70 - 80	400 only	255 & 265	2&4-Bolt main caps.
330817	70 - 80	400 only	150-180	2-Bolt main caps.
14010207 14010209	80 - 85	350 only	205 & up	2&4-Bolt main caps.
14088548 14093638 14316379	86 - 88	350 only	205 & up	2&4-Bolt main caps. 1 piece rear main seal.
10125327	92 & UP	350 only	300 & up	2-Bolt main caps. 1 piece rear main seal. LT-1 blocks
14101148	88 & UP	350 only	205 & up	2&4-Bolt main caps. 1 piece rear main seal. Late model roller non LT1
10051184	86 & UP	350 only	N/A	4-Bolt main caps. 1 piece rear main seal. BOWTIE

SMALL BLOCK HEAD CASTING NUMBERS

Casting #	Years made	Valve Size	HP levels used for	Notes
333882	70-80	1.94/1.50	150-180	76 CC Chambers Intake flow 137.2 CFM Exhaust flow 95.4 CFM These are crack prone!
462624	76-87	1.94/1.50 & 2.02/1.60	Not listed	76 CC Chambers These are crack prone!
3782461	61-70	1.94/1.50 & 2.02/1.6	250-375	64 CC Chambers No bolt holes These are the doubble humps.
3890462	62-68	1.94/1.50 & 2.02/1.6	250-350	64 CC Chambers No bolt holes These are also doubble humps.
3917291	62-69	1.94/1.50 & 2.02/1.6	275-350	64 CC Chambers No bolt holes These are also doubble hump heads.
3927186	68-72	1.94/1.50 & 2.02/1.6	290-370	64 CC Chambers has bolt holes These are the small doubble hump heads.
3917292	67-68	2.02/1.6	350	64 CC Chambers 350 Corvette heads.
340292	73-80	2.02/1.6	300 & UP	64 CC Chambers These are the 'turbo' heads with angle plugs.
3932441	67-79	1.94/1.50	250 & 255	76 CC Chambers Intake flow 152 CFM Exhaust flow 93.2 CFM These have flat seat spark plugs.
3947040	68-70	1.94/1.50 & 2.02/1.6	290-370	64 CC Chambers
3947041	68-70	1.94/1.50 & 2.02/1.6	290-370	64 CC Chambers
3973414	64-70	2.02/1.6	360 & 370	64 CC Chambers Z-28 & Corvette LT-1.
3973487	68-79	1.94/1.50 & 2.02/1.6	165-330	76 CC Chambers X casting has 10 more intake cc volume.
3998993	68-79	1.72/1.50 & 1.94/1.50	115-175	76 CC Chambers Intake flow 150.8 CFM Exhaust flow 91.1 CFM Heavy duty casting. Small plug.
14096217	90 & up	1.94/1.50	300	64 CC Chambers Heavy duty casting. Small plug. GM crate 350 heads.
12558062	97 & up	1.94/1.50	N/A	76 CC Chambers Vortec L-31 heads
10088113	86 & up	1.94/1.50	N/A	57 CC Chambers Late Model Aluminum Vette heads

HEAD CASTINGS CHART # 2

CASTING #	YEARS USED	USED ON
333882	70-76	400 SMALL BLOCK
354434	75-76	262
	76-79	305
358741	76-79	305
3030817	74	400 2 BOLT
3636839	55	265
367450	75-76	262
3703358	55-56	265 - TRUCK
3713569	55-56	265 - TRUCK
3725306	56-57	265
3720991	56-57	265
3731262	56	265 2X4 BB CARB CORVETTE
3731548	57-62	283
3731554	57	283 CAR OR TRUCK
3731539	57-61	283 TRUCK
3731544	55-61	265 - 283
3731556	57	283 TRUCK
3737739	57-62	283 & 283 CORVETTE F.I.
3737775	62-67	283 - 327
3740997	57	283
3743056	58	283 TRUCK
3743096	62-67	327 GMC TRUCK
3747363	57-62	265
3748720	57-58	283 4BB OR 2X4 OR F.I. VETTE
3748770	55-61	265-283
	58-62	283
	57	283
3748772	58-62	283
3755537	57-62	283
3755539	58-62	283 TRUCK
3755549	57-62	283 CAR & TRUCK
3755550	57-62	283
3755585	62-67	327 GMC AND TRUCK
3756519	57-62	283 AND 283 F.I. VETTE
3760116	59	283 4BB OR F.I. CORVETTE
3767460	62-64	283 - 327
3767462	62-67	327
3737465	60-61	283
3767754	60-61	283
3767792	60-67	283 car & truck
3770126	67-70	327 - 350
3774682	60-64	283 - 327 cars and trucks
3774684	62-64	283-327 Chev trucks & GMC
3774692	58-64	283
3782461	62-70	307 - 327 - 350
3782870	62-67	327 & 327 Corvette
3782879	62-67	327 & 327 Corvette
3789817	62-67	327 & 327 Corvette
3789935	57-62	283
3790721	64-67	283
3792563	65-67	327
3795896	63-72	283 -307 - 327
3798996	63-67	327
3814480	60-67	283 - 327
3814482	62-67	327 - 350
3817680	59	283 4bbl & F.I.
3817681	62-67	327 - 350
3817682	61-62	283 2 bbl
3836839	55	265
3836842	57-67	265-283-327
3837064	56-62	265-283
3837065	55-56	265 truck
3837739	57	283 & 283 truck
3848720	57-58	283
3849852	57-67	283
3859935	65-67	283
3852174	62-64	327
3854520	62-67	283-327
3855961	68-76	350 2 bolt
3858174	65-67	327
3864812	57-67	283 & 283 truck
3867802	57-60	283 & F.I. Corvette
3876132	62-67	327 & 327 Corvette
3876775	60-67	283-327
3884520	60-67	283-327
3981462	62-67	302-327-350
3981492	64-67	327
3892657	65-67	327
3896944	65-67	283
3911032	68-69	327-307
3912264	58-62	283 car & truck
3912265	63-64	283
3912311	67	350
3912313	65-67	327
3914636	68-73	307
3914660	68-69	327 & 327 Corvette
3914678	68-69	327 & 327 Corvette
3917264	67	302
3917290	68-69	307-327
3917291	68-69	350-327
	67-70	350-327
3917292	68	327
3917293	68-69	307
3921175	66	327 (350 hp)
3927185	68-75	307-327-350
3927186	68-72	302-327-350
3927187	69-70	302-350
3927188	69	307-327-350 light truck appl.
3928454	68	307
3928455	68	302-327-(325 hp and 350 hp)
3928494	68	327 High Pf 4bbl & 350
3928495	68	327 std. & 327 (250 hp)
3931633	68-73	307
3931635	68-76	350
3931637	68-69	327 & 327 Corvette
3931638	68	327 truck
3931639	68	302
3932373	68-73	307
3932386	68-76	327-350-350 (4 bolt) & 327 Vette
3932388	68-76	350 2 bolt
3932441	67-72	327-350
3932454	68069	307
3932882	76	400
3946812	69	350 truck
3946813	68-70	350
3947041	69-70	350
3951509	74	400 (2 bolt)
3951511	70-73	400 (4 bolt)
3951598	70-73	400 (2bbl carb)
3956618	68-76	350 (4 bolt)
3958618	68-76	350 (2 Bolt)
3964286		350
3970010	68-76	350 (4 Bolt)
3970020	68-73	307
3970126	67-70	327-350
3973487	68-71	350 High Perf.
	71	350 trucks and Pass. Cars
3973493	72-76	400
3986339	68-76	307-350
3991492	69-70	350
3998916	72	400
3998991	68-76	350-307
3998993	68-76	350 low perf. cars and trucks
3998997	72	400
	78-79	305
	78-79	350
	80-84	350
468642	78-79	350
	80-84	350
517513	79	267
6259425	68-76	350 (2 bolt)
6260856		350
14014415	80-82	267
14014416	80-84	305
14022301	80-84	305
14022601	80-82	267

HEAD CASTINGS CHART # 3 (SMALL BLOCK)

Casting #	Combustion Chamber CC's	1.94/1.50 Max- Stock	Intake port volume
034	64	2.02/1.6	190
041	64	2.02/1.6	160
101	55	N/A	196
113	58	1.94/1.5	163
186	64	2.02/1.6	160
292	64	NA	180
441	76	1.94/1.5	155
441X	80	1.94/1.6	155
461	64	2.02/1.6	165
461X	64	2.02/1.6	170
462	64	2.02/1.6	160
492	64	2.02/1.6	160
624	76	2.02/1.6	160
896	59	1.72/1.5	137
997/493	76	1.94/1.5	160

SMALL BLOCK CRANK SHAFT CASTING NUMBERS

Casting #	Stroke	Years made	Main\rod Journal Size	Notes
1130	3.25	68-73	2.45/2.10	Cast large journal
14088532	3.48	86-88	2.45/2.10	Forged One Piece rear main seal.
3279	3.00	68-69	2.45/2.10	forged large journal High Perf.
3729449	3.00	55-67	2.30/2.00	Forged
3782680	3.25	62-67	2.30/2.00	Forged Small Journal
3941178	3.00	68-69	2.45/2.10	Forged large journal High perf.
3951529	3.75	70-80	2.65/2.10	Cast large journal Externaly Balanced.
3892690	3.48	69-85	2.45/2.10	Forged large journal
39411182	3.48	69-85	2.45/2.10	Forged large journal
354431	3.10	75-76	2.45/2.10	Cast large journal only found in the 262, makes good stroker crank for 283's

INTAKE CASTING NUMBERS

Casting #	carb style	Years made	HP levels	Notes
3731394	Dual Quad	56-57	225, 245 & 270	Aluminum 283 dual quad.
3739653	Dual Quad	58-61	245 & 270	Aluminum 283 dual quad.
3794129	4-Brl	63	340	Corvette Aluminum 327
3795397	4-Brl	62	340	Corvette Aluminum 327
3844461	4-Brl	64-65	350 & 365	Corvette Aluminum 327
3890490	4-Brl	66-67	350	Corvette/Chevy II Aluminum 327
3917610	4-Brl	67-68	290	302 Z-28 Aluminum
3932472	4-Brl	69-70	290 & 370	302/350 Z-28 Aluminum
3941126 3941130	Cross Ram	68-69	290	Top and Base Z-28 302 Aluminum
3959594	4-Brl	71-72	255 & 330	Z-28 and Corvette Aluminum 350
3972110	4-Brl	70	360 & 370	Z-28 and Corvette Aluminum 350
3972114	4-Brl	70-72	255 & 360	Z-28 350 Aluminum
3972116	4-Brl	70	N\A	Service Replacement Aluminum 350
3972361	4-Brl	71	330	Z-28 350 Aluminum
10051103	4-Brl	90	N\A	Bowtie Aluminum Raised Runner Single plane 350
14014432	4-Brl	81	Not listed	Z-28 Aluminum 350
14057053	4-Brl	Late Model	Not Listed	All 305 & 350 Aluminum
14031372	TBI	80-82	Not Listed	All 305 & 350 Aluminum cross fire corvette and camaro
3746829	4-Brl	58-64	220, 230 & 250	WCFB 283/327
3783244	4-Brl	62-63	250	WCFB 327
3799349	4-Brl	62-64	300	AFB 327
3844459	4-Brl	63-65	300	AFB 327
3872783	4-Brl	66-67	220, 275 & 300	HOLLEY 283/327
3872788	4-Brl	66-67	220, 275 & 300	HOLLEY 283/327
3875954	4-Brl	66	275	AFB 327
3882858	4-Brl	66	220	AFB 283
3905393	4-Brl	67	275 & 295	Q-JET 327/350
3919803	4-Brl	67-68	250-350	Q-JET 327/350
3927184	4-Brl	69	255, 300 & 350	Q-JET 350
3965577	4-Brl	70	300 & 350	Q-JET 350
14096242	4-Brl	90	Not listed	High Rise Iron Holley
3916313	2-Brl	69-70	235, 250 & 265	All Passenger 307/327/350/400
3973467	2-Brl	71	245 & 255	Passenger 350/400