just thinking, maybe build a steel rect frame to support the cab and your sleeper assy, then support it with a pair of car leaf springs in the back with a firestone airbags for the lift, add a pair of small car shocks and the whole thing should ride nice, independent of the twisting main frame... just a quick thought..
-blizz
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2001 GMC 6500 Topkick, 22' box, dropped frame, designed to fit into a 9' garage door. 3126 CAT 6spd Man Lo-Pro 19.5's w/ 3.07 rear axle ratio
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