They fought oil pressure with vacuum on this motor from the start. Dad had sent them a brand new Moroso enhanced 4 vane, and it was struggling to stay in the 50's down lower on pressure. Talked to some different reputable builders and they said they have had motors that just don't like vacuum pumps and never can figure out why. They made a pull without the belt on the pump and pressure started in the upper 70's and made it into the 80's later in the pull. So we just sent them his old 3 vane we have been running. And no, they never pulled it any farther, kind of 1 of those caught up in the moment things where I wish we would have had them so I knew how many hp difference per 100 it was going to be in case I missed a shift by just a little (As far as consistency goes). Will see how it runs hopefully tomorrow, hope the chassis handles it ok and we are able to get it down the track with rebound adjustments on the shocks and not get into 4 link bar changes.