Mine rubbed the UCAs, wheel well liner, pinch welds, and front mud flaps in certain situations...1.25" spacers, A little trimming, BFH (fold over pinch weld) and mud flap removal up front fixed my problems for now, haven't had a chance yet to wheel and trail test, fwiw my sway bars are connected. Some pics of the rubbing here
http://www.toyota-4runner.org/3rd-gen-t4rs/204835-16-fj-trail-wheel-285-75-16-combo.html
Also, you may have already done this but if not you probably want to make sure your TBU will fit in that setup. I don't know anyone with those wheels on a 3rd gen that has done it but haven't searched extensively either. There is a thread on here listing successful wheel options for a TBU and last time I checked (>year ago these hadn't yet been tested). You aren't exactly near me >3hr drive but if you swing through S.A. you are welcome to test fit one of my wheels if you would like. (Also I would be curious as the TBU is on my list of to-do's...)