6 Pack Issues

Either put an electric pump on it and run a return line, OR a mechanical pump with enough pressure to stand running a return line. The return line and higher PSI pump will solve the issue.....that is IF it is really vapor lock. I've said this many, many times, but real vapor lock is pretty rare. In fact, I'd be skiddish to make that diagnosis for you, because of the type of fuel hose you are running. Even though it has steel braid over the rubber fuel hose, that's still an extra layer of insulation, however poor steel is for an insulator.