I had an old 1966 Jeep wagoneer that had drum brakes and a power set up (is that called a hydra vac) that was up on the fender in the engine compartment and just plumbed into the brake line from the master cylinder and a vacumm line to the manifold.
As far as I could see (and as well as I remember !) it was like an 'add on' to the standard setup.
Didn't the newer AD big trucks have a similiar set up that was on the frame under the deck?
Ter
