option 4 for me. Only because I have done it and loved it. My last cruiser had 315/75/16 (35" tire) BFG all terrains and I loved it. They did rub a little but my COG was low and I had the extra lift from the tires to keep the axles higher along with the body. I lost some power but nothing I couldnt handle. your turbo diesel so throw some 35"s on it and turm up the boost
