I agree with the p7100 option if allowed in your pulling class.I'm building 4.9 liter russian tractor engine. In to the factory pump I can only fit 10mm plunger. And why to build all the "middle" pumps when I now that I want P7100.
What manufacturer do you bought?I'm running a chinese head in my VE pump, seems to do everything it should. I bought it through aliexpress, couldn't figure out how to work alibaba
it was the only one that was on there at the timeWhat manufacturer do you bought?