I was told last night I should publish some of the mods I've done to my TR6 in the case that others may be interested, so I'll start with the Hydraulic Release bearing kit that I found from Racetorations (http://www.racetorations.co.uk).
As many of us would know, the original clutch fork mechanism wasn't one of Triumph's best designs, with the pin that holds the fork on the shaft, shearing from the moment of pushing the clutch, and the fact that its not central adds another moment. So when it breaks, it doesn't completely fail, but makes the pedal only half effective.
Add to this that many owners have also had the issue of the collar that slides over the input shaft binding after many years of use due to lubricant caked with clutch dust, and the fact that the collar isn't being pushed forward and back directly along the line of the collar, but the forces imposed on it are also down by the mechanism.
Both of these issues contribute to a pretty sub-standard clutch pedal by today's standards. And if I were going to the trouble of removing my gearbox, I wanted to upgrade it. So I did!