Truck: '13 Chevy 2500HD, cc, sb, 4X4, SRW, Dmax, Allison. Stock suspension, but will upgrade to Timbrens, and may look into air bags.Looking at KZ Durango Gold G359RET: UVW 10640, dry hitch 2190, dry axle 8450, NCC 2960, GVWR 13600.Hitch is a Reese 2...