I've seen some scary body lifts. 3" tubing, hockey pucks, wood blocks
. The higher the body lift the more leverage the body can exert on the mounts, if all you do is mud then 3" would probably be OK. If you get it twisty once in a while I would stay with 2" and under.
Billet aluminum is a good choise for body lift material. 6061-T6 Round stock somewhere around 3" in diameter would work.
Usually there are a lot of other considerations with a body lift. Linkages for your tranny, T-case, re-positioning the rad or the shroud, moving the bumpers up, extending the filler neck on the fuel tank (maybe). Also you will have a huge gap between the frame and the body (duh!
) and if you mud a lot you'll need to fill this somehow in the front to prevent drowning the motor in mud and water.
I'll be installing the ORD 1" body lift when I splice a new rear half on my truck in the next couple of weeks, and thats as big as I want for a body lift. I figure if I need more I'll do suspension (more suspension
).
Rene