AMC used them into the early 70s. https://www.ebay.com/itm/1970-71-AM...864516&hash=item5d7f5dfeac:g:XlMAAOSwLnlagvaj My 75 Gremlin had four wheel drum brakes.
Okay. I vaguely remember they having to invent a remote vacuum tank, for times when the car was accelerating or climbing a hill