Re: body lifts
the body sets on the frame but not bare metal to metal. there are say 11 "points" or locations where the body comes in contact with the frame. at these points is a "spacer" or "mount" made of hard rubber which cushions the ride and probably other uses. anyway, a body lift involves adding a spacer of variable thickness depending on how much you want to pull the body away from the frame. this will allow you to fit a taller tire on the axle because the axle is attached to the frame by the springs. make sense?