quote:Originally posted by Cowboy from Hell:
The casting # is on the bottom of one of the intake runners. You can't see it without removing the head & flipping it over.
If the head has a plain 4 in the corner, its a 1970 (D0AE). If it has a 4 & a "dot" its a 1971 or later (D1AE, D1ZE, D2ZE, D3ZE).
-G
If you have the intake off you can use a mirror to see the code letters.
Mike