I'm working on the brakes on my 1962 c60. The shop manual does a good job at describing the in depth bleeding procedure including bleeding the hydrovac and specifying the use of a pressure bleeder.
I made up a cheap pressure bleeder today using a hand pump weed sprayer. It was as simple as drilling and tapping a hole for a 0-20psi pressure gauge and adding a clear 3/8 hose in place of the sprayer wand. A metal plate with rubber gasket and a barbed fitting bolts to the top of the master to supply pressurized brake fluid to the systeem.
There are youtube videos out there showing how to diy make these units.
