[jhv48]

As I recall, a larger master cylinder takes more effort but pumps more fluid.
A larger slave gets you less travel, not sure about the effort.
Somebody correct me if I'm wrong, but a larger m/c might make the problem worse. If your clutch disengages fine now, and you are getting about an inch of travel at the clutch fork, you don't need any more.

The next adjustment will have to come on the clutch pedal by moving the mounting rod of the master cylinder up about a quarter of an inch.