If you do a body lift I wouldn't go more than 2" either or even better do a hocky puck bodylift that stuff is a tough as nails and they don't slide around but you only get an inch out of them.
rs, i am surprised you of all people recomeend a hockey puck lift!
that said befoer this gets into a flame, i am against hockey puck lifts for several reasons. if you may be interested search for it. hockey pucks were never designed nor have been tested to support the body of a vehicle..