Hi Taylor, and welcome. The more Burros, the more.. Burros...
I have a 1980, and it was a total refurb from the guy I bought it from and into my ownership. The good news, not much goes wrong with them. The double shell with vertical seam makes the coach virtually maintenance free. No rivets to deal with which means: Less leak potential. It also makes it less likely to rattle apart with frequent use or on rough roads.
Windows and roof vents are about the only place you need to worry about
leaks.
Double shell makes it easy to add on electrical items, just pull thruogh the wall as you would at home! Is yours insulated? Mine is, and my mods were a bit tuffer with it, but still doable and clean.
Double shell also makes it impossible to re-arrange the furniture
About the only radical mod you can do in this respect is the front dinnette mod. I did this with mine, and have no regrets. The goucho was removed and the seats used for dinette seats, a table put in place and the bed stays down 24/7. If you have kids, this may not be an option, but it sure makes life easier, and makes the inside look much more cozy and practicle.
The bad news: Check your frame, especially at the "A", where it bends in towards the tongue. Burros, among others, are notorious for splitting and breaking right where the bend begins. Mine has been repaired twice. The re-inforcement done by a very good welder with lots of experience makes me not ever have to worry about that again though.
With one as old as yours, I would crawl under there with a magnifying glass and a bright
light before I tugged it anywhere. I might even just get it re enforced regardless to avoid the inevitable. Any little hairline split can turn into a ripping gap in minutes.
Take it to someone who knows trailers intimately and have it inspected. Ask to look underneath it with them when they have it on the rack so you can familiarize yourself with how the gas lines run and have a look at how the
axle is mounted. Save info for future reference. I owned mine for a year before I was able to get a clear view, and it helped tremendously.
The rest is the same as all the other eggs, nothing special about the appliances etc. They pretty much are interchangable when it comes to these items.
Tires are easy. Any tire store can fix you up. I have 14 inch STs on mine. There is a lot of debate about STs vs. Passenger
tires, but I went with STs, as they are only a pitance more and thats what comes recommended by most.
Wheels, are another story. Yours is no doubt a 4 bolt pattern, unless it was changed in it's past life. I got hub caps for my ugly old, but still good, ones at a hubcap store.
Have fun with it!