what sort of pressure are you getting???? does it change from cold to hot?????......i am getting 40psi at cold and 20-25psi at full temp, it is a 4wd 200block in a 2wd saff shells look mint as does oil pump, the only other thing i could think of apart from the oil pump is the little spring that go's in the side of the pump the one you change when you get the high pressure oil pump kit.....if this spring had lost it's goodness would this cause low oil pressure problem???????