bjuice

install the proper e-vac system...4 vane moroso should help if not eliminate this problem...have about 500 to 800 to send ..depending how much of the kit you need..


Also before you go doing all of this you should check the size heads you have and the exhaust..the most natural way for exhaust to exit an engine..if you cannot get it out of the exhaust fast enough it will find its own way out such as intake gaskets, rear seals.etc......


after you go here then check on the pump deal...you need the pump irregardless IMO.

thanks- Brian