Urgent help needed

THANK YOU FOR ALL THE REPLIES. Even if I only use them to be sure my brain is functioning on the right track, they are helpful.

I also checked with a professional engine builder friend. He said to be sure that the plug at the end of the lifter oil galley inside the block is in place. This plug is inside the block, below the oil pump drive gear. It is supposed to be accessed through a hole in the block on the back side near the distributor. If you pull the drive gear and stick your hand down in the cavity at the end of the lifter oil galley you'll either feel a plug or a threaded hole. No plug, no oil pressure, no lifter pump.

Since this engine was rebuilt in a College auto shop class........... Guess what I'm checking tonight??

Thanks again for all the help.

fastmopar