Hello Oh Don:
There are two very extensive discussions about tow vehicles and what they can and can't do that have taken place just recently on the forum. Rather than repeat what has already been said (many times), I would recommend that you visit the Towing and Tow Vehicles section and browse through these threads:
a) "Truck Passing with Flying Colors", and
b) "Advantages and Disadvantages of towing with a 1/2 T and a 3/4 T."
Both of these threads are full of information that you will find helpful.
Also, please refer to your
truck's owner's manual and look under the towing section, go to the
Ford truck website and check for towing information about your truck there and try
this website .....
www.trailerlife.com
Installing air bags and other helpers will not increase your towing capacity--- they will simply even out your two rigs and perhaps smooth the ride somewhat.
I am not putting off answering your question but I would just be repeating what has already been said earlier in other threads.
It might help if you were to have a fairly good idea of what you and your wife want or need in a trailer or 5th wheel....features, floor plan, size of family, etc.
Good luck in your research and search for an RV suited for safe towing with your Ford.