Ok, let me see if I can answer your question. Consider that when Ford makes a product like the Mustang, they want to keep the differences between the product lines to the min. This means that more often than not, the car's wiring harness is the same between V6, GT, and DOHC (except when there HAS to be a difference).
I compared the fuel pump wiring diagrams between the 3.8 Liter V6 and the 4.6 liter V8. Guess what! The diagrams are nearly identical. Same connector numbers, connector pins, number of wires, and wire colors.
So... I figure that means you could buy a V6 tank and put a GT fuel pump into it.
I also suspect that you could use a V6 fuel pump basket and swap out the pumps within it. Since the electrical connectors are the same, should work with no issues. Fuel sending units should be the same by the same reasoning.
Note, I compared the wiring diagrams for the 2002 model year. I suspect the reasoning will hold for your MY. Also note that there is a standard version and a Calf low ems version. Don't know what those differences are. But it is likely that if doing business with local salvage yards, the cars will come from your area.
Hope this helps.