Ever since I got my car I've had a cold start problem with it. About 10 minutes after sitting overnight or for a long time the engine acts fuel starved for a few minutes. I've worked with Edelbrock technical support, replaced the HEI module and spark plugs. Had the timing checked and replaced the fuel filter. I even put a new carburetor on it but so far, nothing has eliminated this problem. Once the car has been started and run for about 15 minutes, it starts perfectly and runs fine all day long until the next cold start. The car is a glass bodied 37 Ford on what I believe is a modified 37 frame. It has a stainless gas tank that sits between the rear frame rails. The fitting for the gas line is located about midway between the top and the bottom of the tank on the right side. The fuel line is routed in an upward direction from where it connects to the tank (about 2-3 inches) and runs along the top of the frame rail to the the mechanical fuel pump on the engine. After looking at this I'm beginning to wonder if some of the the fuel is draining back into the tank after the car sits for an extended period and then causing it to act like it's running out of gas until the line is completely filled again. If that's the case, what are my options? Can I install in in-line electric fuel pump? Are there any kind of check valves that would keep gas in the fuel line from draining back into the tank? Could this problem be symptomatic of a bad mechanical fuel pump or does this sound like fuel line routing / gravity issue?