BEL1107 / 1107 - Application Notes 90-94 C1500 Standard Cab 454SS - (2”, 4”) 88-98 C2500 - All (Except 8-Lug) - (2”, 4”) Notes: - 4“ Ext. Cab must use #4981. 6“ Ext. Cab must use #4985 driveline alignment kit. - For trucks w/o O.E. front sway bar order adapter kit #5700.