Oil pump priming question

After re-reading the posts, I see that rustycowll69 did mentioned the cup plug. I don't recall the size, but it's listed in one of the Direct Connection manuals and I believe it slightly different than what goes into the lifter galley passages behind the cam plate.

If dropping a thin rod down the oil pressure passage determines it's missing, you'll have to drop the pan and the rear main cap to put the correct sized plug in. Here is the diagram and old part #. But I haven't been able to find the plug size.