Joe,
Yes, I would have expected the pedal stroke to have been closer to 6". The 5.25" is a cord of the arc.
My clutch pedal assy is using the original non-effort-reduction shaft and arm. That is what is used in your pic of my assy.
When I added the effort reduction kit to my pedal assy, the vendor that I bought the kit from said that the pedal shaft and arm were the same with and without the kit. I have not had the opportunity to verify this.
The clutch throwout fork is currently installed in the car. I will try to find another that I can measure next week.
I measured the stroke on an original Pantera clutch master cyl, and the stroke is 1.125". That is max stroke, with the piston bottomed in its bore. Bottoming the piston would not be good, so I would expect the acceptable in-service stroke to be no more than 1".
John
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