I am on a limited budget and am thinking of putting a three inch body lift on my 1980 cj7. The body lift kits listed in Quadratrac say that with the three inch I will not require any shock, spring, or driveshaft changes. Is it that simple -- just put the spacers on and I will not have to change or adjust anything else. The reason I ask is that the 3" is only around $80.00 -- this I can afford, if I do not have to do any other modifications.