Your tow vehicle is apparently rated at 6500 pounds, which was more than adequate, even in pre-J2807 days. However, it is 26 years old and may have a bunch of miles on it, so my thought is that a transmission cooler is a good preventive measure, and a lot cheaper than a transmission rebuild. At very least, I would suggest an OBD electronic gauge such as a ScanGauge (lots of info on this Forum) so you can keep track of transmission temperature. I believe that 1996 vehicles had OBD-II rather than original OBD, which is helpful, but be sure to check it. This is especially important if you plan to tow in the mountains.
The wheelbase is a bit short at 135", so you may find that a WDH makes traveling a bit easier. Again, the forum has a lot of info about making that decision. Take a look in the TM Technical Library sub-forum. Sway control is not needed, though there is nothing wrong with having it if you feel the need.
Bill
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