What shocks do you have? How much bumpstop? You may have to increase your bumpstop a little. How much uptravel you have will affect how close your tires get to the fenders and frame.
I can tell you that with one inch bumpstop and 4.25" backspace wheels (17x8.5), I get my 305/70R17s (Essentially 35x12.5) within a mm of the frame.