Canadian 1971 Duster 340 4-Speed
First off, that is a great looking 340 Duster! Given the condition it's in and assuming no metal was replaced when repainted in the '80's it was probably and Vancouver or Vancouver Island car during its early life in BC. The rest of BC had snow which means salt on the roads.... unless the original owners didn't drive it in the winter. Nice purchase!
I too question the "unrestored" claim since it has been painted and the engine is out and nowhere near it's original CID. Definitely a lightly restored car but not an unrestored one.
https://www.hagerty.ca/articles-videos/Articles/2011/04/04/Unrestored-Car-Sales