mopars are still out in the weeds!

Hi All, new here. Great forum. I'm restoring a 73 360 Dart Sport (clone) but I was talking to a friend of a friend about cars just last week and he said he knew where a Duster or Demon was in a backyard rusting away. Turns out it was a 72 340 Demon.
It was rusted badly (both rear quarters, the trunk lip, trunk floor, inside floors and more) but the motor runs (valves and oil pan very clean). I gave the guy $400 and had it towed to my house where I already stripped it down. I really hate to destroy a numbers matching car but from the quarter windows back the car was more rust than metal. Plus the car was stored unevenly, rusted so bad or it was wrecked at one time because the doors won't close. A shame really.
BTW- I'm keeping the motor and 8 3/4.
Anyway, you never know, as hard as it seems to find one when you want to, they are still out there.