Greg and Beccy Kline?s 1967 Chevelle SS 396 -- I got the car home, parked it said a few choice words closed the hood and went to bed. The next day, I took the vaIve covers off and things looked good. I changed the oil and fired it up. It actually seemed to run okay although had a noticeable loss of power. I had a head job with ALL new parts. A good buddy helped me put it all back together including a new comp 270 magnum camshaft and lifters. We got it all back together, broke in the cam and she was back on the road, or so I thought! The car seemed to run good and had good oil pressure at idle but as soon as it would warm up and running at a constant RPM, the oil pressure would go from 50psi to 10psi! It was actually decreasing oil pressure as the RPM was increased.