[red82gt]

If I let just the fuel pump run the pressure gets up to 6 1/4 and stays, unless you leave it for like 10 seconds or something (why would you), then it'll overpower the diaphragm. I see the mechanical pump as another source for a leak in the timing cover. Also, my pump uses about 4 amps of current, I think the holleys and barry grants use as much as 6. You're the only person I've heard say that the electric is a problem.
About the rubber line, if fuel is sitting inside it it's one thing, if it's submerged in fuel it's another. Almost every carb builder and racer I know all say the same thing "Rubber is not fuel line" do not use any of it. If you tell them you've had a problem with needle and seats sticking the first question they'll ask is if you have any rubber lines in the fuel system. Also that cheap POS that comes with the avenger carbs tends to draw fire from tech inspectors and they usually get the tape measure out, it's not a quality piece and is damn near 12" of rubber on it's own.