tkb I was thinking the same thing. I am trying to measure bearing travel through the bellhousing with what use to be the OEM clutch fork hole, I can only see this by using my mechanics mirror
Mcleod also recomended (in the fine print of course) to drill a hole in the bottom of the OEM bell housing to allow easy disc air gap measurements during clutch set-up to ensure 0.050". I should have done this to make measuring easier in hind-site. Now its a little trial and error. Lesson learned.
Arthur, Since I am using a concentric slave, if I increase the master cyl bore beyond 3/4", yes I'll get more fluid displaced per stroke, but the concentric slave will over extend (beyond the design limit of 0.500" and leak.
EDIT May 2011 : I was wrong, even a 13/16 bore will not over extend the htob piston with 0.160 initial gap to PP fingers. I did the math then measured it on the car. The pedal stop of course can control this. Mcleod claims the 3/4" master cyl is all thats needed to get the 0.500" travel from concentric slave. I need to prove to myself that I am already @ 0.500 concentric slave travel, ( be bleeding again and measuring the travel) which I haven't done yet, before I go to the next step. I figured I can make a gauge using rigid copper house wiring to check for 0.375" travel at bearing. What I need is a telescope gauge on a flexible handle. Hmmm necessity is the mother of all invention as they say.
Thanks all