Yeah, lol... I doubt any of those things applies to your Elek-Trak... Unless you really had some aspirations, I mean.
Now, as far as changing a tire goes, it's very simple, but I'll warn you to either weld bolts to those holes and use nuts to hold the wheels on, or at least put a single pin somewhere. It's a pain to line up bolt-centered wheels, cuz you have to hold them up while you try to insert the first bolt, and there's no hub for them to rest on.
__________________
"¿ʞɐǝɹɟ ɐ ǝɹ,noʎ uǝɥʍ 'ʇı ʇ,usı 'ʎlǝuol s,ʇı"