58 Impala...Brakes were a little low, so decided to put on new shoes. Installed new shoes...adjusted..bled. Still no pedal..put trans(pwrglide) in neutral(like manual said)...pumped up...started engine (348)...pedal went to floor to destroy vacuum in line...But after return, still hardly any pedal, just enough to stop car in driveway(leery of putting on road). All hoses seem ok.........Don't know what else to check. Any ideas please...need help. Thanks