I ran 32x11.50 AT's on 15x8's w/3.75BS on my '90 for a few years and they only rubbed a little at full lock at the inner body seam. All you have to do to resolve this issue is beat the seam down w/a good sized hammer. It will be easier if you take the tire off, so you can get a good swing. You can also grind the seam down, but the hammer route is the easiest. With a narrower rim/or narower tirethe 32's may not rub at all.

More than tread lightly. Leave it like you were never there, nor anyone else.
'90 X-cab 4.88's 33 BFG AT's, rr ARB, Headers, Ignition upgrade, cold air induction.
'91 X-cab 5.29's 315's BFG MT's, rr ARB, custom bumper and flatbed