Plumbing a fuel system

I am totally confused here on the plumbing from the tank forward and back.
Tvt59 and Newbomb seem to contradict each other, or, is it bad wording. I did look at the Pro systems site, blurred pictures and printing. I have an old '69 Road Runner, was probably a race car at one time, it's street now. The old fuel cell in the trunk was way over the hill, as was the -8 fuel line up to the regulator and beyond. It has a Carter fuel pump (electric) with a canister filter that was before the pump. So I am replacing the whole fuel system up to the duel quads, it's a Gen ll Hemi at .070 over and stock stroke, so, 440 cu in. I do want to have a return fuel line. Was looking at a tanks stock fuel tank with in tank pump, but after borrowing a stock fuel tank, it's going to be in conflict with the coilover, ladder bar, Dana 60 suspension. So, going back into the trunk with a 15 or 16 gallon plastic fuel cell, probably an RCI. Had planned on 3/8" copper/nickle fuel line with -8 flared AN fittings. So, I am still confused about the plumbing order. We could do this through pm if necessary.