My buddys k5 has a 4in lift with 35" super swampers. Not sure how wide but theyre WIDE. They rub on the frame in the back (barely), he wants to put a 3in BL on it to get more clearence. Should he get spacers for the rims? Would it be way to sketch to grind the smallest amount off the side of the frame where it rubs? I wanna convince him not to go with the BL, esepecially since he's keeping the tire size (front fenders are trimmed so that doesnt rub). And he thinks he wont have to worry aobut driveline, brakeline, etc with a BL. Driveline I understand but the brakelines are gonna be a problem and whatever else right? I say zero rates but he thinks they're too expensive, and know that I think of it, can you have blocks with zero rates?