In the early 80's I had a 71 RR that I built a 67, 915 headed 440 for. I used a high pressure pump on it and with 6 quarts of oil the gauge would fluctuate. With 7 quarts it was rock solid 72 lbs pressure at cruise, cold it would peg the 100lb gauge. When I rebuilt it I used a HV pump and the pressure was normal with 6 quarts. :realcrazy:
