The adjustment really is simple. You put a block on the clutch pedal holding it to max travel, then you turn the adjustment screw on the slave cylinder until you get the clearance specified between the disc and plate.
There was some discussion in the past of a slave cylinder that looked like the Pantera version but was from another application. I don't remember the specifics on that at the moment...and there is the stainless part from Pantera's East that has a different bore.
After adjusting for the clearance needed, when you release the clutch pedal, IF you don't get full lock up, replace the slave cylinder.
This is not rocket science.
I've never been to England so if I came and did this for you I'm very likely to just get distracted by all the typical tourist traps.
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