I have an '07 3075RL Montana previously pulled by an '07 F350, now by a '12 F350. Long beds so no slider. The Montana has the older Moryde suspension. Did not have much chucking to begin with, only on certain (usually concrete) highway sections. I did add a 5th Airborne air ride pin box and it pretty much eliminated what chucking I did have, as well as softening the overall ride.
But I did have to lower my previous hitch a couple bolt holes to make up for the increased height of the new pin box. My new truck and hitch does not have that adjustment so I now run just a little nose high. Not so much as I am concerned about it though.
The pin box install would have been a little easier with an extra set of hands, but really a pretty simple one man install with a little up front planning.