Can these Fast backs be saved?

I was recently offered this no title 74 Duster that spent too many years in the woods. I had the option of paying to tow it to my place or stripping it where it sat and the owner would get rid of what was left. I took option 2-and glad I did. Didn't look near as bad as those but underneath it was a crunchy critter. Every time I jacked it up it crunched and flexed. If possible, I would grab any parts you can off those and let nature have the rest.

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