BEL126 / 126 - Application Notes 90-96 C2500 Extended Cab - 8-Lug - (3”, 4”) 90-96 C3500 Extended Cab / Dually - (3”, 4”) 1989 C3500 Extended Cab / Dually - (3”, 4”) Notes: - For increased suspension travel use #6911 C-Section Frame Kit. - It is highly recommended to use an AirJack - For trucks w/o O.E. front sway bar order adapter kit #5700.