An apology might be in order--a few threads ago, I asked for some advice on the brake problem I'm having with my 85 Brat. No pressure in the system. Pedal to the floor. Cant pump up--cant bleed with the pedal. Someone suggested to look at the vacuum booster and I thought they were teasing me. Is it possible that a faulty booster could cause a total hydraulic failure?

IIRC you replaced the Master cylinder. Are you positive you got the right one? and did you hook it up properly so it's actually getting pressed by the rod form the pedal?