Rarest A-Body Option?

Thats some neat info! He's had the car sense he was a kid. Drove it until it was too rotted away. All original #'s matching with fender tag, vin, and I think build sheet, dark (royal?) blue with blue interior. He pulled the drive train and is eventually going to re-body the car. The floor hump & Z-bar support braket came off this car for mine. Those were practically the only good parts on it! Some day I need to get a picture of it as it sits in his private junk yard with no front end, interior, or top.

This is the flor hump I got out of the car. The whole car looks like the lower edge of it:(