Installed a terra flex leveling kit with stiffer stock Spings. Got almost 2.5in of lift. Looking to see if 297/70/r17 will fit? Have an offer on a set of tires.

 

That lift will clear 35s, one of the issues you may have however is some rubbing if you utilize the stock rims, due to the backspacing. But the chances of that happening with the size tire you listed seems minimal. But that's just my opinion. If you wheel it hard then of course there's other factors to consider, but just fitting the tires it should work.

 

Your limiting factor will be the stock bump stops and wheel offset. With 4.5" of back spacing you can run a 285 or wider and with stock bump stops 33" height might have very minor rub on the stock flares.