Andy, what fuel pump did you use with this system? Holley now offers direct fit fuel tank kits (made by Tanks, Inc.) that come with a Walbro (I think) 255 lph drop in pump. They claim the 255 pump will support up to 550 hp. I know you are making more steam than that. They have a 400 lph pump as well. Did you use something like this or did you go another route?
