Planning on getting a 09 chevy silverado z71 4x4 1500 5.3L gas extended cab. want to get a fabtech or skyjacker 6" lift kit. Does anyone know if the kit knuckles will fit on a 16x10 wheel with 4.5" backspacing? can i get away with less backspacing? looking to run 35x12.50s or maybe some cutting and get away with some 37s.