7M4400 is a correct casting number for the D333a 4-1/2" bore engine.
Thanks Old Magnet. Want to give an educated guess what the block with crank and pistons would weigh? I have a heavy duty 1/2 ton and a 1 ton truck, but would prefer to use the 1/2 ton if it would handle it.
Just found my engine casting # 4M2950 is this compatible with
7M4400?