dodge guy wrote:
You won't know until you hook it up loaded for a trip.
Good advise.
Make a short trip or just load it all up and drive around the block will tell if air bags are needed.
Ford gives your truck a 6340 rawr. You have the 6.2 gasser and have a bit lighter rear axle weight (70-90 lbs) than the 6.7 diesel.
You have the truck so drop by a set of CAT scales and get the trucks front and rear axle weights.
Rear axle numbers may be around 2900-3000 lbs as it comes from the factory. This leaves around 3300 lbs for a in the bed payload.
I would use the trailers GVWR and its dry weight. Some trailers can have 1990 lb hitch weight but after loading may weigh anywhere up to 2800 lbs. Much depends on the trailer mfg CCC. Some trailers that size may have a 3500 lb CCC or 780 lb CCC like my older 11200 lb trailer.