These seats came in my 65 dart. Im pretty sure the back seat is a mopar a body. Not sure about the bucket though. IM guessing the seats came out of the same plymouth that the hubcaps came from
Bump for ideas. Do I need better pictures? Maybe somewhere I can look for part numbers or stampings? There was a build sheet under the back seat but crumpled into pieces when I tried to pull it out.
I'm taking a guess, based on a lot of junkyarding and owning various brands of cars over the years. To me the back seat looks like '73-'76 dart or scamp. But the front seats look like the ones in my Ford pinto. Sounds crazy I know but that's my two cents.