Did it last year. Firestone bags on each corner and an air compressor bolted to the frame. I tied the fronts together on the same air circuit and the rears together also. Use paddle valves in the cab to adjust on the fly if I want. Not the best set up. On a turn with body roll the air will move left and/or right and actually increase the amount of roll although I really didn't notice much change in roll. The ride improved some but not to the geewiz limo ride comfort. One can only do so much with an F53 chassis without ripping out what's there and starting over, which is available from a company in Michigan just can't recall their name. Complete suspension change with airbags.
So for this year I'm currently working on a solenoid circuits, the various switches, gauges and such for independent operation. Probably excessive over kill but I'm having fun.
PM me with an email address if you want the details.