There are times when you want a high volume pump. In contrast to your small block, my stroked flat tappet FE has .003 main clearances and .0028 rod clearances. It also has a remote filter and an
oil cooler. It runs 15w40
oil and my hot idle pressure is 15psi, sometimes less. This is when idling at 650 and my
oil pressure comes up instantly with revs and generally will be in the mid 40's at 2000 RPM when really hot. The lifter galleries are plugged (solid cam) and I have .060 restrictors up top in the heads. And I run a Melling high volume pump.