Congratulations on your purchase

SRT wasn't a thing in '92, it's just called an RT/10. I like Lexol on my leather and Mothers VLR on everything else, but there are a thousand opinions on what the "best" products are. The temperature swings won't have nearly as much effect of the interior plastic as UV exposure will. The interior plastic on these things seems to be pretty hardy, I don't know if I've ever seen anyone post about age related cracking. You can buy a cheap antifreeze tester at any auto parts store to determine if you're coolant is mixed well enough to keep it from freezing. To "winterize" mine, all I do is disconnect the battery, put mothballs in the interior, stuff dryer sheets in all the external openings, and put many D-con wedges around the car. But, I live on a grain farm and my garage is more "two stall shack" than "garage", so I go through some extra steps to keep the mice out.
How much do you plan to drive it? If more than very occasionally, you'll want new tires, and do a search for "Gen I headgaskets" as the original style had a habit of going bad.
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