So, basically I need to borrow a set of 17's and see if they fit, commit to ITR (too bad I really liked the ITS guys I've met and ITR seems slim around here), and adjust accordingly. Why am I having a problem that the no one else with identical car is having? I wonder if the owner has the diffs mixed up as well. The diff I pulled has 3.73 written on it, but I didn't do the drive shaft/wheel revolution check before I pulled it.