Join Date: Dec 2001
Location: Belleville, Illinois
Thanked 22 Times in 17 Posts
That seems to be one of those questions that can only be answered by a test. Some guys have put a relatively mild lift and had driveshaft vibrations, while others have put on a much taller lift with no trouble. If the 3.5 was OK new, the odds are that another half inch won't hurt, but you won't know until you try.
I think sticking with leaf springs is wise. Suspension systems are much more complicated than the seem at first glance, even leaf spring systems. On our Jeeps the details of the suspension aren't as critical as on a car that will drive, corner and brake at high speed, but you could still screw things up if the conversion were done wrong.