clutch fork travel

So after all of the discussions, can anyone tell me how far the fork travels at
the slave cylinder?
It should be very easy to fabricate a bracket that mounts to the tranny
I can drill a hole in the pedal box to accept the terminal end of the cable and
adjustment would be via a nut welded to pedal box
The cable will attach to the clutch pedal

My only concern is will I generate too much travel at the fork?
Is there such a thing as too much travel?