Did some interesting brake work on my 87 Waggy today. Replaced one rear drum, pass side, lubed the adjusters, replaced the rotor on the drivers side front, and the pads on the passenger side front. Bleed the combo valve again, and rear brakes and ran out of daylight. The drum and rotor were at or barely past the wear limits, the other two were nearly new.
I still have a mushy marshmellow like brake peddle with the engine running, but great hard peddle with the engine off, but I feel more braking power than before. We did get more air out the lines this time, which was amazing, since we bleed this beast about 100 times with about 2 gallons of brake fluid the past year trying to solve the mush problem.
The master cylinder is nearly new (not rebuilt), maybe 6 months and the Vac booster is barely 2 years old, and working fine.