It was in a garage. We’d run it a little in the summers but that was about it. According to my uncle, even the tires are original. (I had them looked at by a guy at the local tire shop and he said they don’t show any cracking so go ahead and drive with them)
Your local tire guy is full of poo poo. You do not want to drive on tires that are almost 30 years old. No cracking dosen't mean a thing on tires that old. Even if garaged, tires/compound will deteriorate over time.
IIt's just not worth risking your truck on those oldies. A set of OE size tires for everyday use won't break the bank. Heck, I wouldn't even use a tire that old for a spare.
In addition, the rubber valve stems are probably shot as well.
And, if they are the original tires, over the years of sitting in Pa, hot/cold cycles have possibly built up moisture maybe causing rims to rust.
My 2009 only had 23,500 miles on it when I got it in March. Still had the original tires on it and they "looked: good. Second day I had it, it got new tires.
Just be on the safe side and get some new shoes.
Grumpaw