Enlarge oil pickup to 1/2" NPT Hemi size and radius all instersections with the backside of a round carbide burr, disassemble oil pump and radius and remove all casting marks with a sandroll, remove oil pump relief valve and polish with some Scotchbrite, enlarge mains 2,3,4 with a long 9/32" drill bit, also since this is a 4spd car drill rear face of thrust bearing to intersect main oil feed 1/32" diameter. That's pretty much it. Engine had very good oil pressure trends with 76psi at 3800rpm-6000rpm WOT and 35-37psi hot 190F+ idle (1080-1100rpm). J.Rob
