Freshly rebui;t 351W. This is my second oil pump. I cannot get oil up to my rocker arms and such. There has to be a pressure problem. My guage reads 5PSI at idle and about 20-25 at 2,000 RPM, but still not getting oil to my rocker arms. I have the oil pan off. The oil pump is stock. I rebuilt this engine. Did I do something wrong? The engine runs fine but the lack of oil pressure worries me. I have ensured that the pick-up is clear of any blockage. The oil filter is getting oil past that I am not sure where the oil goes. What is going on here! HELP!!!!