I am looking to put a leveling kit on my 2015 Ram 1500 4x4 Crew cab and new tires, looking for suggestions on what kit to get and if I should change tire size, also on tires what load range, I do tow a tractor (7000 lbs) 2-3 times a year short distance and hunt so off road driving some but mostly highway driving. Thanks forgot truck has 275/60/r20’s on it