BEL1539 / 1539 - Application Notes 88-98 C2500 - All (Except 8-Lug) - (4-5”, 6”) 90-94 C1500 Standard Cab 454SS - (4-5”, 6”) Notes: - Not designed for diesel applications. - 88-91 must use Alignment Kit #4950. - 4“ Ext. Cab must use #4981. 6“ Ext. Cab must use #4985 driveline alignment kit. - It is highly recommended to use an AirJack - For trucks w/o O.E. front sway bar order adapter kit #5700.