I was on my way home from work today and was watching my oil pressure guage. I have 2 of them a mechanical autometer guage and the factory one in the instrument cluster. They were both sweeping back and forth from 50-60 at hywy speeds. When the car was stopped and at idle they both would drop down to around 15 If I was driving and would floor it the pressure would drop and then climb up. I have a high volume oil pump and it normally sits at 70psi at hywy speeds and 40 at idle. I just had a the block and heads at a machine shop for new bearing seals and rings. I had a busted main cap that they replaced and they said everything besides that looked good. I have roughly 800 miles on the motor now. Any suggestions would be great.