I've got a Superlift IFS lift and their rear springs. I still rub with 33 12.5 on 8" wheels. I think the backspacing or offset or whatever it is is 4". I put a 1" block in the rear in addition to Superlift springs and just barely clear. If there is dirt on my tires, the lugs clip the bodywork. In the front it's not an issue unless I'm turned fully one way or the other. How anyone could squeeze a 35" tire in there with just a 4" lift and no hammering/cutting is beyond me.