Extended Notes: 1. May require driveshaft lengthening for 13" (u-joint to u-joint) driveshaft. 2. May require larger diameter driveshaft if equipped with a 41-1/2" front driveshaft. 3. Extended shackles recommended to clear military wrap. 4. Models with accessories like hardtop, rear tire carrier, roof rack etc., should use #004351 springs on front and rear. 5. When combining lifted shackles with a 3.5" suspension system, a tail shaft eliminator kit and a "CV" style rear driveshaft may be required to eliminate driveline vibration.