Re: Reinstalling A/C
One of my 85 Jeeps was missing the condensor unit when I got it, and by the look of things, it had been gone for quite awhile. I bought a used one off of ebay (risky) and had a new compressor to condensor hose made, and hooked it up, and changed it with R134. Would freeze me out for the first few years until I got a pin hole in the condensor. Have a replacement, but haven't gotten around to putting it on yet.
Point being, while contamination MAY have junked the AC system, it might not have. Unless you find one with working AC (which is rare these days on the squares) you might have little to do, or it might take a total replacement.
I wouldn't let the AC system deter you if that's the ONLY thing keeping you from buying a truck.
As Rich says, a whole new system isn't that much money. Lot cheaper than a lot of other potential problems you might find in a 30 year old vehicle.
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