differential/wheel questions

[traenknerperformance]

hey guys, just picked up a 56 3200 that ive been trying to buy off a guy for 10 years. i finally wore him down and we went and picked it up this week. we have a camaro doner car that im using the ls1/t56 out of. ive problably spent 10 hours reading this week to get a game plan, i have it all figured out except the rear. im going to 4 link it and do a TCI MII set up

i decided on a explorer diff that i found yesterday out of a 99. id like to run a 315 tire in the rear. for rims i want to use 5 lug steel wheels with dogdish center caps. does anyone know if there is a car out there that has a wide enough steel rim/with correct back specing that i can do this in a 15 or 16" rim?

the truck also came with a shortbed so we are working on cutting the frame today to fit the short bed