My 73' has 32s and has cut fenders with James Duff fiberglass flares. The top of the tailgate when open measures 31 inches from the ground. What is the stock height supposed to be? I am not sure if it alreay has a suspension lift, and would hate to buy a 2 inch lift if I already had one. With a 2 inch James Duff lift would I be able to fit 33s? Is it posible that I already have a 2 incher?