Oil pump to gears clearance
A bit of background, my '73 360 j4500 had extremely low hot idle oil pressure when I first got it. I replaced the oil pump gears with a Melling kit and and dressed the filter adapter as it was scored, it still had only approx 5 psi hot idle with 20/50 oil (cheap mechanical gauge) I checked crank bearing clearances and all came in within spec apart from one big end that was about 1/2 thou out. I have pulled the timing cover off as motor is out at the moment and plastigaged the gear to adapter clearance and I have 4 thou.
I know you are shooting for 1.5-2 thou ideally but how much of a difference in pressure is around 2 thou less clearance going to net me? I'm pulling the cam tomorrow to check condition of the cam bearings.