One trick I learned is to order the rear end a little narrower than needed. That way you can use thin wheel spacers to push the wheel out to the edge of the fender for looks. I'll remove the spacers when I'm going to drive the car a lot, but if I'm going to a car show I'll put the spacers in so the tires are pushed all the way to the edge. Usually all you need is 1/2 per side to give you extra clearance for driving.