1953
- 1967 Corvette Specification Guide
(1953-1967 Cylinder Head Casting Numbers)
1953
| 3836066* |
6-Cylinder, 150 Horsepower |
1954
| 3836241* |
6-Cylinder, 150/155 Horsepower |
1955
| 3836241* |
6-Cylinder,
155 Horsepower |
| 3703523 |
V-8,
195 Horsepower |
*
The tapped hole for the 1953-55-6-cylinder temperature sender did
not require an adaptor.
1956
| 3725306 |
All
210 & Early-255 Horsepower with 2-bolt Exhaust Manifolds |
| 3731762** |
Later-
225 & All 240 Horsepower with 3-bolt Exhaust Manifolds |
**
Some carryover into early 1957 production occurred.
1957
| 3740997 |
220,
245, 250 & 270 Horsepower |
| 3731539 |
283
Horsepower, Fuel Injection |
1958-1960
|
3748770*** |
1958 & possibly very-early-1959; All Engines; Contains "X58"
on Side |
|
3755550*** |
Early-1959; All Engines |
|
3767465 |
Late-1959; All Engines |
|
3774692 |
All
1960 Engines |
***
Staggered valve cover mounting holes.
1961
|
3774692 |
230, 245 & 270 Horsepower |
|
3782461 |
275
& 315 Horsepower, Fuel Injection |
1962
| 3795896 |
250
Horsepower |
| 3884520 |
250
Horsepower (unverified) |
| 3782461 |
300,
340 & 360 Horsepower |
1963-1964
|
3795896 |
Base 250 Horsepower |
|
3782461 |
All
Optional Engines |
1965
|
3782461 |
All
327 Cubic-Inch Engines |
|
3856208 |
425
Horsepower 396 Cubic-Inch Engines |
1966
| 3782461 |
All
327 Cubic-Inch Engines |
| 3872702 |
390
Horsepower 427 Engines |
| 3873858 |
427
Horsepower 427 Engines |
1967
|
3890462 |
300
& 350 Horsepower 327 Engines |
|
3909802 |
390
& 400 Horsepower 427 Engines |
|
3904391 |
435
Horsepower 427 Engines (Cast Iron) |
|
3904392 |
L88
& L89 (Aluminum) |
Corvette
Cylinder Head Casting Information
The six cylinder engine cylinder head casting number is located
on the left top of the head, between the valves of the #2 and #3
cylinders, directly above their exhaust port outlet. The number
is visible with the valve rocker cover installed.
The six cylinder head casting date is located in the valve rocker
area next to the #4 and #5 cylinder exhaust valves, and is visible
only with the valve rocker cover removed. The casting date
is deciphered in the same manner as described for engine blocks.
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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