wood blocks under the jacks.. If the tc is level, it hasn't tipped over yet, another 6" in the air is not going to magically make it tip over.
2011 F350 6.7L Diesel 4x4 CrewCab longbed Dually, 2019 Lance 1062, Torqlift Talons, Fast Guns, upper and lower Stable Loads, Super Hitch, 48" Super Truss, Airlift loadlifter 5000 extreme airbags