Im sure this has been posted before but here goes again. IM am getting ready to lift my 2013 express, my question is has anyone done much towing with a lift. I currently have a 30ft 6500 pound camper i tow, i also have the airlift 100 airbags under the truck. Should i stay with my leveling kit i have or will it be ok to lift and if so would 6inch be to much or should i stay with say a 4 inch. More than likely will be putting a set of aftermarket wheels and 35's on it. Any help would be appreciated.