I'm not sure exactly which part of the brake linkage you are missing. The "pivot point" for the brake pedal is integral to the master cylinder, i.e. the brake pedal arm attaches directly to the master cylinder. Hope this helps.

Oldbolter
1959 Apache 3800 dually flat bed/dump with 261
1956 3800 dually flat bed/dump with 235
1957 3600 flat bed, 350 engine, 700R4, PS, disc brakes, 14 bolt rear with 4.11 gears