I tried to do the same to my Bronco. It only had the main brackets on the axle, but not the ones for the ends of the sway bar. My local Ford dealer's parts cost was only around $200. If you have a '21, you may not have the brackets either.
Having sold my '92 after buying my '21, there are a couple of thing to be aware of. You will be losing about a foot of width in the interior so you cannot carry as much stuff in the back. The rear window hinges up and the tailgate swings out so If you plan on towing a trailer, it could be an...
As I have the B&O system, I was planning on just upgrading the speakers. But I have read that the factory amp will keep me from getting the full benefit of doing so. But it also sounds like these amps are not my best choice.
On your way to Austin, stop at the Luling City Market for the best ribs served on butcher paper! And don't even think about stopping at Chuy's. It is not good Mexican food. Be sure to stop in a Bucees for the cleanest bathrooms on the road, but don't eat their BBQ unless you like gristle!
Amazon has a 20" hitch. https://www.amazon.com/Replacement-Super-Extra-Receiver-Trailer/dp/B0BBN625L7/ref=sr_1_53?crid=1PXUU7C5EFEPT&keywords=extra+long+receiver+hitch&qid=1675958842&sprefix=long+receiver+hitch%2Caps%2C118&sr=8-53
I am glad you pointed this out. I have yet to tow my boat. I guess for short trips, opening the rear window and closing the tailgate might work. Otherwise, maybe having a extension added to the tongue of your trailer, but that might be unweildy.