Ever heard of a 'MUSCLE HUSTLE' package?

i hung out at my local Plymouth dealer in Glen Dale, W.Va. from 1967 to 1974. i also went through a number of mopars during that time. i now have an extensive library of sales brochures, posters and other stuff from the "golden years" of mopar muscle. i have never heard of the option package "Muscle Hustle." HOWEVER, back during the classic auto company "muscle car" wars, Chevy, Ford and Mopar all had "special" marketing packages offered on some of their cars in different markets all over the U.S. most gear heads have heard of the "California Mustang" package that was only available on 67-68 Mustangs out in California. i have also heard that there was a special "all chrome" grill package offered by Plymouth on the 68 Barracudas out West. but i have never heard of the Muscle Hustle package. if i were to guess - having lived through the "disco 70's" i would say that if there were such a Mopar package as the Muscle Hustle package - it would have been on the 75-79 Chrysler cars.