having a serious problem with a oil pressure on a 327. the oil pressure was fine then i had a set of 461 double humps redone. put on permatourqe felpro gaskets from the heads up. replaced the canister oil filter w/ spin on style. got everything dialed in fired it up oil psi was at 20, warmed up to 180 degrees oil psi at 0. dropped the oil pan no metal in it bearings seem ok. no metal in oil filter either. removed the oil pump relief spring seems to be working ok. no oil in the valvetrain either. can't figure this one out need some help i'm stumped!