I don't think it would cause any problems. You're about nearing the limit there though in my opinion, in terms of width. Sounds like a cool project though. Not a lot of 4 doors.
Another smoking deal. Alas my car is SBP, just don't have the money to do a swap right now. Have KH brakes up front and those'll probably stay. So I'll likely be running SBP in the front BBP in the back