You can probably get away with those tires with just a 2" body lift and a little trimming if you stick with the stock wheels (a lot of people switch to steel rockcrawler wheels with less backspacing - so they stick out further.... if you do that you have to have more lift to clear a given set of tires because they don't tuck up into the wheel wells).

You can get it from http://www.4x4parts.com pretty cheap.

The instructions on the 2" suck though. Any local X club guys in his area that can help him slap the lift on?
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