If all you want is clearnce for 31's, you don't need a lift.

I ran 275/70/16's (Bigger than 31's by about a 1/2"-1" depending on brand) w/o a lift....for 2 years. NO problems.



All you do is snip of the corner of where the mud flap mounts to that the tire would clip at full turn, takes a few minutes max, easy and painless.

Turn the wheel, see where it touches, cut it off....I did it at the tire place, then drove it home.