^^^ A 3500 and NO factory air suspension.Buy a 3500 problem solved.
Actually any truck with leaf (not coil) springs would probably work.
BTW @Abuisse, what's the camper's wet weight?
With out knowing that number it would be pretty hard to pick a truck to put it on.
Thanks, and keep us posted.
P.S., Yeah I know... his post count is '1' so...