Volfandt,
thanks for your response. Yes my mains were set for .001 to ,002. I was very careful because I was trying to get good results from a new rear main seal, and I did. I am thinking my cam bearings are probably quite worn and of course they will be replaced and maybe the cam if it is worn. I am wondering if there are any other places to look for the problem. I actually replaced the oil pump twice and it made no difference. I use the Rotella 15W40 and I understand it still has some good additives in it. I think I will parallel a new oil pressure gauge and see if they agree.