If ya got the space, just pull the battery and park it somewhere. Nothin wrong with letting it "grow" in your yard. As long as you don't have a rodent problem, these cars are astonishingly good at sitting for a long while, then being totally ready to roll after a fresh battery. Would likely be problem free if ya put a trickle charger on it, changed the tranny fluid (crap settles out if you store it for many months), then drove it a couple times a year.

These are pretty durable cars, but replacement of large parts like engine, trans, PS box, etc are expensive. I've seen your work and i know you wouldn't settle for using cheap crap parts. Lot of times rebuilt OEM or just salvaged OEM is the best way to go. Remember, a trans costs about $1500-1800 for a rebuilt unit and they're not easy to come by or cheap to ship in. Engines are easier, but if you need a rebuild it's still expensive and even more time consuming. If you ever need one, you'd be able to just drop in a complete long block, with everything attached....