oiling mods for dummies

Yes-rear sump milidon 9 quart truck pan - putting in full groove bearings-yes problem happened AFTER the guy in indiana screwed with a perfectly good oiling system-last year pretty much 50 lbs of oil pressure average dropped very little when warm. I dont know what pump it had from barton the guy this winter canned it along with screwing our motor up.i will answer every question to the best of my ability.i truely appreciate ALL help i can get-motor was 365 stock stroke with 13 to 1 compression with 308 swirl port heads with a jesel rocker system 1.7 o. Intake 1.6 on exhaust-that was all removed because supposedly the heads were cracked-now eddy headed with 1.5 crane rockers if any of this matters-thanks Steve