So what happens with W2 heads that oil through the pushrods?
This blocks off oil into the heads but now feeds from the lifters. How does this change things?
Awesome post BTW.
It's doable, but you want to make sure the lifters get oil AFTER the crank.
When you move the oil feed to the bottom of the cap, you use a (IIRC) 5/16 set screw and tap the the Chrysler oil feed to block the oil going to the lifters. If you are going to use PR oiling I'd either tube the passenger gallery or bush all the lifter bores. Then you drill an .0625 hole in the tube or the bushings to feed the lifter. The plugs you use to stop oil going to the lifter gallery you drill with a .125 hole and that will feed the lifters and pushrods.
Then you still have oil to the rods at the correct time, with full pressure and flow and the rods get liked before the lifters.