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CASTING #'S

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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

 

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