I purchased a '90 W250 that has a horrendous lift installed and need to go back to stock. The ubolts are currently allthread and super long due to 12" lift or so. Does anyone know what the factory size ubolts are for front and rear? Front is Dana44 so 3500 lb. axle. I'm guessing the bolts are supposed to be 9/16. The front passenger outer would be bigger due to diff and the passenger inner is two studs. Anybody been through this and remember what they had purchased or had made? Thx