[Tommy]

Regarding the return line discussion: My Holley electric pump with internal pressure regulator, single line system worked fine for cruising. But on a hot day after several hot laps at the track (Roebling Road), it would develop fuel problems. I believe the extra load on the fuel pump at the track made it run hotter. The internal pressure regulator system routes excess fuel from the pump output side back to the input side, keeping it directly above the hot fuel pump. When the recirculating fuel got hot enough, it would vaporize and cause a vapor lock problem for the pump. I replaced the internal fuel regulator system with an external regulator and a return line to the fuel tank. That system doesn't allow any fuel to stay near the fuel pump long enough to vaporize. It's worked great.