I read something on this quite a while ago, and if I remember correctly, you'll have to make up mounts to put them in an A Body. If you could get a look at an interior side shot of one of the original Hemi Darts, it might be enough to see how they were mounted from the factory. Maybe do a search on Moparts because it seems that's where I saw the thread. I think the guy used 1" square tubing and made kind of a rectangular floor adapter to mount the seat.