As you guys saw, I just got my RPM converted to SEFI. I couldn't really find anything searching online as far as plumbing the fuel lines. It looks like the line loops from side to side on the back. One in on the front, is the other return? I also had to relocate the heater nipple to the front. Heater hose would have been right against the line in the back. Also what are your thoughts using the Holley square bore throttle body? Is a square to spread bore adapter a good idea?