I have 2 OEM mechanical pumps that I could rebuild. wouldn’t that only work if you had the original carburetor? I’m running a Weber dgas on an F. Can you adjust the pressure on the mechanical pumps or would you need a fuel pressure regulator to drop it back to the 2.5 to 3.5 psi recommende?Mechanical pumps will typically last much longer than electric pumps, are less prone to heat failure & as designed my Toyota will keep the correct pressure.