408 oiling advice

After many trouble free years of fun from my 671 topped 340 it’s time to build a new engine.My choice is a 99 magnum 5.9 block, .030 over, filled with a forged 4” crank, H beams with 2000 bolts,Mahle 34cc forged pistons,Hughes girdle and Kevco pan.In the middle is Bullet custom blower hyd roller cam.And topped with a pair of trick flows.I want the oiling to be as good as the rest of the engine.So far I have all the 1/2” drilling at the rear,including the rear main cap and pump done.All five cam feeds have been tapped and plugged at the main saddles and a .125 feed hole drilled in plug.All sharp corners that I can reach in the 1/2” feeds have been rounded off.I’ve spent the last few hours reading the guitar Jones thread from long ago.I got to page 22 or so, and decided the last ten or so pages was a bit of back and forth exchange of
ideas .Anyway I’ve decided to do the crossover mod.I’ve got hydraulic roller lifters,oil through push rods,and Harland Sharp rollers on top.So after all this,my questions are,what is the preferred drill size for mains to lifter galley.9/32 or 5/16? Is it proper to restrict oil to #5 cam bearing? And does the infamous front main feed block off, go on the right or left side Feed to the galley?