[Philip Saran]

Pete, first thing you need to do is get the tonge of the trailer weighed,
with the trailer loaded, that will give you the weight you need for the
torshion bars either 700 or 1000 lb bars is what you will end up with.

You will also need to add a set of Airbags to the trucks rear suspension
to handle the load.

I drive a 2004 F350 4x4 superduty diesel and it is fine just towing a
trailer, but when I add the 9ft-11in cab over camper it adds 2700 lbs
and I need air bags to handle the extra weight.

You can google airbags and find a ton of info and pricing.