I have had no end of trouble with the clutch in my Austin.
I shall be buying a new master cylinder tomorrow and re-plumbing the whole system.
If I replace the 0.625" bore cylinder with a 0.750" one will the clutch feel noticeably heavier?
It didn't feel particularly heavy when it was working and I'm hoping that moving more fluid may improve it.
At the moment the master and slave are a matched new pair, designed for the Essex V6 and overdrive gearbox that they are attached to.