Ever heard of a 'MUSCLE HUSTLE' package?

Some years ago I was told about a dealer nstalled trim option package called 'Muscle Hustle' - package.
Should have been available in the early 70s on Mopars.
The name itself reminds me on the 'Hustle Stuff'-Catalogue.
But I've found nothing more about it.

Has anyone here ever heard or read about it (or is it only one more Mopar legend...)?