Low oil pressure?

I'm not telling you to disagree, I trying to get you to see the big picture, the book is wrong and has been printed over and over and nobody changed it, so forget the book and look at the diagram. Your not a dumb guy but you refuse to acknowledge the book is wrong.

Take the filter off and put a U pipe there the oil still goes through the engine, take the plug out and plug the 2 holes going to the filter, the oil goes through the engine, pretty simple.

View attachment 1715207965
.
I won't Red X you however I don't agree with everything you're saying. LOL
I have a great idea for how to answer this question. That is at the Larry Shepherd seminar at the Nationals on Saturday someone asked him about leaving the plug out. And that should give us the answer we've all been waiting for.

Meet Butch Leal at the HDK Tent, signing autographs along with the debut of his 1975 B/MP Duster. Larry Shepard Tech Seminar - In celebration of the 50th Anniversary of the 340 Small Block debut in 1968, Larry has prepared some Tips & Tricks for the owner along with a Q&A. The Seminar takes place on Saturday at 1:00PM at the Nats Seminar/Match Box Race Tent located just behind the large Green Mopar Pavillion.
Unfortunately I won't be there so I can't ask him but surely someone here will be there and can do it.