how rare are power Brakes ?

- Marvin - said
That is interesting to learn, because I always thought, that front disc brakes were standard on H-code Dusters. At least 1970 to 1971?

Disc brakes were an option on the 72 Dusters. The H-Codes were all heavy duty 10" drum brakes unless you put a check mark in the box, asking for the Disc brake option