1968
- 1982 Corvette Specification Guide
(1968-1982
Cylinder Head Casting Numbers)
1968
Cylinder Head Casting Numbers
| 3917291 |
300, 350 Horsepower
327 Cubic-Inch Engines |
| 3917292 |
350
Horsepower 327 Cubic-Inch Engine |
| 3917215 |
390 &
400 Horsepower 427 Cubic-Inch Engines |
| 3919840 |
435 Horsepower
427 Cubic-Inch Engine (Cast Iron) |
| 3919842 |
L88
& L89 (Aluminum) |
1969
Cylinder Head Casting Numbers
| 3927186 |
300 &
350 Horsepower 350 Cubic-Inch Engines |
| 3927187 |
350
Horsepower 350 Cubic-Inch Engine |
| 3947041 |
300 Horsepower
350 Cubic-Inch Engine |
| 3931063 |
390 &
400 Horsepower 427 Cubic-Inch Engines |
| 3919840 |
435 Horsepower
427 Cubic-Inch Engine (Cast Iron) |
| 3919842 |
L89
(Aluminum) |
| 3946074 |
L88
& ZL1 (Aluminum) |
1970
Cylinder Head Casting Numbers
| 3927186 |
300, 350 &
370 Horsepower 350 Cubic-Inch Engines |
| 3927187 |
350
Horsepower 350 Cubic-Inch Engine |
| 3973414 |
370 Horsepower
350 Cubic-Inch Engine |
| 3964290 |
390 Horsepower
454 Cubic-Inch Engine |
| 3964291* |
460 Horsepower
LS7 Engine |
*The
LS7 engine was not produced for retail sale.
1971 Cylinder Head Casting Numbers
| 3973487 |
270 &
330 Horsepower 350 Cubic-Inch Engines |
| 3993820 |
365
Horsepower 454 Cubic-Inch Engine |
| 3994026 |
425 Horsepower
454 Cubic-Inch LS6 Engine (unverified) |
| 3946074 |
425 Horsepower
454 Cubic-Inch LS6 Engine |
1972
Cylinder Head Casting Numbers
| 3973487(X) |
200 &
255 Horsepower 350 Cubic-Inch Engines |
| 3998993 |
200
Horsepower 350 Cubic-Inch Engine (unverified) |
| 3998916 |
255 Horsepower
350 Cubic-Inch Engine (unverified) |
| 3999241 |
270 Horsepower
454 Cubic-Inch Engine |
*Note:
(X) indicates an "X" casting foundry proof mark will appear
after the seven-digit casting number on later 1972 base engine and
LT1 3973487 cylinder heads.
1973
Cylinder
Head Casting Numbers
| 3998993,
333881, 333882 |
L48 350 Cubic-Inch
Base Engine |
| 330545 |
L82 350 Cubic-Inch
Optional Engine |
| 353049 |
LS4 454 Cubic-Inch
Optional Engine |
1974
Cylinder Head Casting Numbers
| 333881,
333882 |
L48 350 Cubic-Inch
Base Engine |
| 333882 |
L82 350 Cubic-Inch
Optional Engine |
| 336781 |
LS4 454 Cubic-Inch
Optional Engine |
1975
& 1976
Cylinder Head Casting Numbers
| 333882 |
All 350 Cubic-Inch
Engines |
1977
Cylinder
Head Casting Numbers
| 333882,
376450 |
L48 350 Cubic-Inch
Base Engine |
| 333882 |
L82 350 Cubic-Inch
Optional Engine |
1978 & 1982
Cylinder Head Casting Numbers
| 462624 |
All 350 Cubic-Inch
Engines |
| 14014416 |
1980 305 Cubic-Inch
Optional Engines (California) |
Corvette
Cylinder Head Casting Information
The
V-8 cylinder head casting numbers and casting dates are located
in the valve rocker area and are only visible with the valve cover
removed. Casting dates for cast-iron cylinder heads are deciphered
in the same manner as described for engine blocks. Aluminum
cylinder heads may not necessarily carry a normal casting date,
but rather a mold date. Aluminum cylinder heads usually carry
a "W" within a snowflake, symbolic of the Winters Aluminum
Foundry Company.
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