Hi, what should I do. When I go to my carb 350, I was wondering if I can somehow use my stock fuel pump (40 psi) and regulate it down to carb (7 psi). What is the part number if you have one? I need a return line though don't I because the stock fuel pump has that line that goes back to it. I want to use the stock fuel pump because it is still new (1 yr old) and I want the capability of having the fuel gauge.