Yea I was concerned about this as well. I havent had any issues yet. I am runnign 245's but they are prolly jsut as far out as those guys were runnign with my offset.
Im going to test it pretty hard and see what happens, but all seems good now. I am runnig 275 springs in the rear and 250s in the front. THe wheel to fender gap is about 2.5 inches in the rear, I didnt measure the front.
I have cut out as much metal as possible for hte location of the zg's. If you raised the ZG up you will end up with hella gap between the tire and flares. And if you lower it more to close the gap then your at the same position.... My car wouldnt be very streetable anymore if i lowered it farther, subframe connectors are about 3" off the ground in the front Im guessing.
If you guys and interested in having me throw together a mounting package with precut welting, SS bolts, inserts and what not I can. I think the total cost would be around 55 bucks. Pm me if your'e interested