With the master cylinder off check to make sure pedal swings free, spring returns pedal smooth. Overfill m. cyl would expell fluid via vented cap design.
BC 1960 Chevy C10 driver 261 T5 4.10 dana 44 power loc 1949 GMC 250 project in waiting 1960 C60 pasture art Retired GM dealer tech. 1980 - 2022