I bought a 6" Rc lift for my 2016 1500, first lift I'm installing. Do I need new control arms or can I keep stock. RC said stock would work but I don't trust them. Also getting new rims and tires I've been told I can only run 35x12.5R20. Would I be able to run 37x12.5R17 looking at the Falken wildpeak MTS. Rims not sure what I'm getting but I'd like a - 12 to - 20 off set.