Tires and wheel question.

At the most I'll run a 28" tire. A 275/60 15 Radial TA is 28" tall, has a section width of 11" & tread width of 8.2". I mocked things up with some cardboard to check clearances & spun it around through the fenderwell & 28" doesn't look like it will be a problem but the 11" section width might be. Moving the rear back a half inch or so if necessary would be pretty easy. Just drill new holes in the spring perches or maybe shim the front hangers. Do you know how much, if any, the Wilwoods moved the rear mounting face for your wheels? I guess with all of the mods you've made to your rear setup the numbers aren't going to mean much anyway. I'll just have to measure, measure, measure. I'm going to run a rear sway bar but hope I don't need a panhard bar. I just don't want to bother with fabbing one. I've got so much to do the whole thing is a bit overwhelming anyway.