Thanks...The pump is a Peterson R4, 5 stage dry sump pump. It has 4 vacuum stages and 1 pump stage. I'm using the one that is modified to run the fuel pump off of the back of the dry sump pump. I like that because if the pump belt ever breaks or comes off the pulley and you loose oil pressure, the fuel pump stops too and the engine stops running. On my deal, the pump is turning at 50% crank speed.