After the seal blew out on the master, what was the repair? I just bled the brakes on my '57 LCF by myself, speed bleeders at the HydroVac #1 & #2, then tighten them and moved to the front wheels with speed bleeders. I have a stock brake system and have great peddle. I think you still have an issue with the master cylinder.
1957 Chevrolet 5700 LCF 283 SM420 2 speed rear, 1955 IH 300U T/A, 1978 Corvette 350 auto, 1978 Yamaha DT175, 1999 Harley Davidson Softail Fat Boy
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