Threaded plugs in 360la block?

No I was missing the one near the distributor drive

But if anybody stumbles on this thread, they need to make sure they have the press in plug under the main cap.

Another thing, the large cap on the back of the motor isn’t 1/4 or 3/8 drive, it’s somewhere in between. You’ll have to either make a tool up, or use the back of a tap if you have one that fits
I don't recall this plug