And as far as circle track, the point where we usually are starved for oil is just as you get off the throttle, slam the brakes and dive into the corner. The 7,000 rpm at the end of the straight away has all the oil on the topside and the G forces take away what was left for a very short period. Good oil pressure coming out of the corner, doesn't take long for the pan to recover the oil it needs coming out of the corner.
If you don't have your blocks together yet you can fix your problem and not need any accumulator.
Grind the rear oil return hole on the passenger side toward the dist bore until the dist bore is 3/16 thick,grind to the front until you get to outer part of the cylinder wall,grind to the outside of the block the same amount.in the rear grind all the way to the back bulkhead plus about 1/8 "
This will give you a return hole that is almost three times stock. now repeat this on the drivers side hole.
Thread all the center holes down the valley 1/4 pipe. get some 1/4 pipe x 1.00 brass nipples and screw into the holes. DO NOT buy after market aluminum or steel nipples,the idea is to have a big vent hole and the brass nipples are the thinest wall.
Using these modifications we haven't run restrictors in any wet sump engine for over 10 years. we have absolutely no oil pressure problems entering or through the corners.Bill