Patrickt, Currently I am using a melling HV
oil pump with an OEM pan ( I know the pan is suspect). When I bought the car it had 1600 miles on a rebuilt engine,
oil pressure did not move above 25psi (cold, hot, idle, 4000 rpms) it didn't matter, just a steady 25 psi. Taking advice from my clutch guy, I was told I may have a problem. I checked the gauge (good), replaced the electric sender (no change), changed the
oil pump to HV and now it's up to 50 psi and gradually works it's way back down to 25-30 psi. The higher oil temp of 220f it will drop to 25-30 at 3000-4000 rpms cruising. At idle it stays the same. Example driving down the fwy 4000 rpms oil is at 220f, 25 psi and get to an offramp and stop...the same psi with very little change either way. I have checked the bearing caps with the plasti-gauge (engine was not upside down)and it read within spec (not tight not loose). Oil is Valvoline 20-50. I do not or haven't yet raced the car on track but I do like to drive with some spirit on occasion. I also have a windage tray. I have checked the oil after driving to see if it is full of bubbles and it looks good. Tell me what you think. I've been told 390's can run on less but if it's a simple thing to improve I'd like to improve it. Thanks, John