BEL248 / 248 - Application Notes 97-00 C2500 / C3500 Crew Cab - SRW 8-Lug - (3”, 4”) 97-00 C3500 Crew Cab / Dually - 8' Bed - (3”, 4”) - For increased suspension travel use #6911 C-Section Frame Kit. - For trucks w/o O.E. front sway bar order adapter kit #5700.