here you go. i just posted this.
Body lifts cause issues that are hard to track down over time. When you change a suspension you are working with a system that was designed to move up and down. It is easy to pinpoint the components that need to be addressed in that system. (ie, longer brake lines).
The body was NEVER intended to be moved away from the frame. You have to lenghten the body bolts, pull on the wire harness, strain on hard brake lines not intended to flex , change shifter linkages and clearance points, extend steering linkages, etc. Additional twist in the frame add stress on the now longer body bolts.
I would agree that body lifts are cheap and easy way to fit bigger tires. But in the long run they are a pain and cause issues. They also leave the frame 2" closer to the ground which is the last thing you want when trying to go wheeling.
Do this math. The whole point of a lift is to fit bigger tires. The whole point of bigger tires is more ground clearance. If a 2" body lift allows you to add a 2" taller tire, that will only net you 1" more ground clearance under the frame. A suspension lift of the same size will net you 3" of clearance under the frame because the frame is moved up by the lift AND the tires.