Force/pressure/strain (even a hamd held scenes will,do )etc.. gauge on the clutch pedal, then that's multiplied by the ratio of the clutch pedal, or even straight on to the clutch fork itself. t's so I can design a fixed mount for the slave cylinder, in terms of how thick steel plate I'd need, as the shape and where it mounts to is pretty much fixed. I also need to take into consideration the leverage between where the mounts for the plate and slave cylinder are.
As without physically measuring is all a stab in the dark. If I can get the force needed to disengage the clutch if gives me a good starting point.
But as I Should be back in the UK in 10 days or so, I can just measure mine