Between the bed and cab should be a plug to allow running a connection to the pickup bed. I have always used a long cord from the camper to the back of the truck where I use a Y-cable to enable towing off the same connection.
If you have access to a junkyard, you may be able pull the perches off the frame rails of a F350 and while on that same truck grab the u-bolts, blocks and upper overload springs.
I was happy with my OEM rear stabilizer bar, but the BigWig is better choice if don't already have one.
My truck also had higher rated coils on the front suspension. It my not be needed unless you plan to add a front cargo basket, aftermarket bumper or winch to your truck.
