bushing lifter bores on 340

I’m wondering about the psi difference between as is vs doing the modifications and either drilling the .040”-.060” in the tubes or not. Hydraulic or otherwise, at idle and up. All this in general
I called huge
Sort of in the same boat myself, LA block, EQ’s w/pushrod oiling now with a hydraulic. But I also have Trick Flow heads and a healthy mechanical cam (with other hardware) in the dugout for when my stroker motor comes out and gets inspected etc and a makeover. Also have a slightly bigger mechanical cam (than the hydraulic) that will work with the springs in the EQ’s that I’m thinking of sticking in without removing the engine, So I’m very interested in this topic you’ve brought up.:)