when i wasnt lowered. it appeared as if they were poking jsut slightly (at +27) but when the suspension compressed, they would tuck under the fender and never rubbed either. I literally, bolted the wheels on and drove off and then only adjusted (lowered the suspension) later after a few weeks.

bolt on the rear wheels, roll the car back and forth so the suspension settles as much and then perhaps just give it a try is what i'd say.

btw coss, just checked today, theres about an inch (slightly over) of space between my wheel/tire and the suspension pieces on the inside. So im assuming you could run a 10" wheel with up to a 40 offset.