Rarest A-Body Option?

I understand the IDEA of the thread, but forgetting the engine/trans thing, I still have to say the LO/BO cars. Technically, they were 270 models (Darts --look at the interior),. with radio AND heater delete one-piece plates, rear seat delete, outside rear-view mirror delete, no warranty (AKA "delete":-D), window mechanisms deleted, non-adjustable seat brackets and A-100 seats, how much more "oddball" parts do want to qualify as "rare" options? The Chrysler announcement for these cars called them for them to be "GT" cars but they actually used the 270 model for the build-up. Just because they were SO "one-off" type cars doesn't mean you should discount them........