The master cylinder on my 66 coupe is bypassing internally (I'm told). The pedal seems hard at first then fades to the floor after about 10 seconds. There is no visable leakage on the M/C or wheels and fluid level remains constant. Anyway my question is, how does the pedal attatch to the M/C (origional 4 drum, single M/C manual set up) will I have to do under dash work, or can it be accessed from the engine bay? Thanks.