Some time ago I replaced my stock gas tank with the tank mounted in the back of the frame near the rear bumper. Now, after the truck sits a few days, it takes a while to start because fuel drains back to the tank. I've thought about an electric fuel pump and am not sure what pressure is appropriate. Also, I was wondering if there was some form of back flow prevention device that could be installed. Your comments and thoughts please about sizing the appropriate electric fuel pump for a carburated engine. Thanks - Tim-o