Year of engine?

[Blazer1970]

Originally posted by 67Fleetsidedream
The casting numbers are not always on a machined surface......My block number were casted in to the block.....

Casting numbers (and casting date codes) are never on a machined surface. They are cast into the block (or manifold, or head, or whatever) at the foundry. Block ID numbers are always stamped on a machined surface - they are stamped at the engine assembly plant.

Oh, and Skokie, those numbers look odd. Is it a small block, big block, 6 cylinder, or what?