V8 motor mount ID help

I bought these from a member on here who said they were for a 360 into a 67 Dart. Well they are not. Guess I should have checked them back when I bought them months ago. Anyways.... I'd like to sell them and would like to be correct about their application (unlike the guy who sold them to me) They look like they could be for an early A. They are the correct width to fit a 340/360 block. They also kind of look like conversion mounts for /6 to V8. Any ideas?