Using air lift kit instead of lift kit
 

Anybody ever used air lift kits to lift a truck about 2 inches. Can't seem to find a forum that says anything about it. Wanting to level my 96 f150 and lift it about 2 inches and put on 31 to 33 inch tires. Should I lift the suspension or the body? Not sure what to do. The truck is a 4x4 and looks like a 2wd truck because I think someone has messed with the suspension before I bought it, or it's just age on the old suspension. Any suggestions?