Multiple Ball Sizes..
No! That's NOT what I meant! Shame on you!
Our '80 Burro also has a 2" ball. 99% sure yours will have the same size.
You can get a system called a 'Change-a-Ball' or 'Swap-a-Ball' - I've seen them called both - that consists of a metal post that bolts to your vehicle's hitch platform. You then get multiple ball sizes that drop over the post and lock on place with a sliding pin. The cheaper set comes as 1-7/8" and 2" balls, the more expensive set has 1-7/8", 2" and 2-1/16" balls. The largest ball is for really heavy trailers, and it won't fit on the cheaper (taller) post.
If you have a receiver-type hitch, where you slide in the square tubing that the ball mounts on, you can mount up to 4 different ball sizes on the tube and rotate the one you want to the top for use.
Hopefully you have just one trailer, and won't need to worry about any of this!
Also: WELCOME & ENJOY! Hope to see you at the 2004 National!