What tires are you running on an 8-8.5" rim on a Duster or Demon? 3.5" bs.
295/50R15's,15x10- 4.5 backspacing on Torquethrust II's with HD competition leafs in the stock location, I'm running a shortened 9 inch Ford but it's cut to A body stock width specs.
I like them sticking out a bit like they did in the late 70's and early 80's.
The last 2 pics are of a 315/50r15 Mickey Thompson on a 10 inch for reference.