[Richard Hudgins]

Steve,

By putting your return line at the bottom of the tank, you are going have a problem with variation in fuel pressure.

With a full tank you will have X+ pressure, with a low tank you will have X- fuel level pressure.

The difference will not be large, but it will introduce a variable that you do not need. Of course as you are putting in a bleed hole, this may take care of the pressure change due to head.

With carb setup, not a big deal in my opinion. But with FI, can cause many problems in programming as small pressure variations cause big problems.