Discrepancies in information on LA and Magnum series oil gallery plugs

I have a book on LA's that shows (plugs) in there. I don't see your upper lefthand bolt that has the hole in it either. It says that engines either have the bolt (with hole) or a drip plate (upper left.) Funny that in one pic it shows the plugs and in another they are not there??
I took the pictures. None of the 4 engines I looked at here have plugs in the oil galleries. 318, 340, 360 and the 5.9.
The camshaft thrust plate from my 360 has the same part number as the one in Rich's 5.9/408 so they both have this design:

TC 11.JPG

The 318 had all four thrust plate bolts in place but no drip tab:

TC 5.JPG

The bolts are all the same, none had a hole drilled through them.
The 1990 360 and 5.9 only have three tapped holes in the face of the block.

360 A56.JPG