Does anybody know if there are significant changes in the suspension of the 3500 2wd dually from previous years to the 03? I really want to take an 04 dually and lower it using Air Ride Technologies air bags, but they don't have a system for the new style and I don't know how long until they do. If the suspension in the front is the same or very similar I can probably get it to work. If the rear dimensions are the same or close, it might work there too. Can anybody shed some light on this?