Massive oil leaks.

Does it look like the rear main area? If you are running a stock style rear main cap. And a thin stock style pan. And he used the stock oil pan bolts. The 2 threaded holes in a stock main seal cap are smaller than all the others that go into the block. If he didn't know this and he put the longer bolt in one of the main cap holes it will bottom out and crack, this causes a bad rear main seal leak. Any mopar engine builder knows this when using stock items. It is noted in most Motor manuals.

If the leak because of a internal pressure problem, consider running a moroso electric vacuum pump. This will stop that issue and it will make more power. Most drag only cars run a vacuum pump the electric style works better for a street car.

If you are running INDY or BI heads they are oiled by lines from the block to the heads. check to see if the hoses are leaking. I don't know how elerbrock heads are oiled.

fyi an easy fix for the stock oil pan seal problem, is to find the 2 shorter bolts and a new rear main seal cap. I used to use 2 oil pan gaskets to solve the problem:

one on the block
then the windage tray
the second gasket then the pan.

An after market rear main cap is not different from the other holes.

if you want to call me send a private message, good luck