you're going to destroy those tires, and your fenders
the 07 (like mine) with 33x12.5's hit the body when i flex, with the block, and a 3" body lift, i've since put expo leafs, and 6400 shackles on, which didn't help the situation any, though when i did that, i took the blocks out, because the shocks weren't long enough... so once i get a chance to cut the shock mounts off, and re-locate them, the blocks (with a little modification) will be going back in
the 4th gens require a 3" body lift and moderate torsion crank to fit 33x12.5's, the front will be fine, the rear will rub while flexing...