Another Mopar Off My Bucket List - Barracuda Fastback

Super rare or not, they still add a significant amount of mass to an already heavy package.

Agreed. Two guys that were with me at the swap meet each own '69 Sixpack SuperBees. They rarely drive their cars so weight wouldn't be as much of a concern as originality or value. They were both curious about the date code though. If they knew (for sure) that it was an extremely rare piece that could have added value to their vehicles, they might have picked it up. - But they were both mystified by it.