1953-1962 Corvette Head Casting Numbers

1953

Number Engine
3836066* 6-Cylinder, 150 Horsepower

* The tapped hole for the 1953-55-6-cylinder temperature sender did not require an adaptor.

1954

Number Engine
3836241* 6-Cylinder, 150/155 Horsepower

* The tapped hole for the 1953-55-6-cylinder temperature sender did not require an adaptor.

1955

Number Engine
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

Number Engine
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

Number Engine
3740997 220, 245, 250 & 270 Horsepower
3731539 283 Horsepower, Fuel Injection

1958-1960

Number Engine
3748770*** 1958 & possibly very-early-1959; All Engines; X58" on Side
3755550*** Early-1959; All Engines
3767465 Late-1959; All Engines
3774692 All 1960 Engines

*** Staggered valve cover mounting holes.

1961

Number Engine
3774692 230, 245 & 270 Horsepower
3782461 275 & 315 Horsepower, Fuel Injection

1962

Number Engine
3795896 250 Horsepower
3884520 250 Horsepower (unverified)
3782461 300, 340 & 360 Horsepower