ohc 6 cly my rebuilt rebuild has 2to 3 cylinders not fireing properly. if my oil pressure is to high does it not over fill the lifters to the point that they do not cloapse as they should.could the 50 psi oil pressure be affecting the opperating of the lifters and valves.wts the proper oil pressure supost to be set at and running pressure set at. thnx any answers apprciated just tryin to keep it orignal.