If it is not Lenny's idea, just had another thought.
Is anyone with the original tank in front, the first version of fuel tank, having this problem? My tank is the front mount and no problem, YET! Because of my tank location, the fuel system is always under pressure even if it is ever so small a pressure. The pump is not sucking from a dry source, the fuel is always there. My fuel pump is below the fuel in the tank.
rocmoc n AZ/Mexico