My 340 bare block

Of the two locations at the front of the block only one is drilled through the other is just marked. At the back of the block sending unit passageway that is drilled also. Yes big bleed off from both of those locations. no tubes have been installed in oil galleries and there are no feeds blocked. I believe they were just at the beginning stages here and left incomplete.
Yeah it looks like taps set screws red Loctite. And I'll pick and choose from the Guitar Jones oil mods for what may apply to me
Just checking in to see if anybody recognized what might be going on there . since I have no history on it, it will be a little rework and restart.