casting numbers

He guys need some help in a slant six block I just bought. They only number on the block are 3105 aawj and 030-5 thats all. Anyone know what this is? It is still on the factory wooden crate and has the original box over it with a shipping date of 1-31-77
:confederateflag::elmer:
I don't get anything out of that. Are there any numbers stamped on the engine ID pad on the passenger's side at the front that would be just behind the alternator? It's part of the head deck surface on the passenger's side at the front.