Jaguar XK8 3 or 4 bolt servo brake pedal assembly? What are the differences? Upgrade? MT06 XKR X100

We have removed the original 3 bolt brake pedal assembly and are investigating upgrading to the later 4 bolt version. We take them both apart to examine all the differences.
00:00 Introduction
01:23 Index of chapters
01:38 Why and when did they change?
05:03 Master cylinders
10:04 Pedal arm
11:55 Servo
16:27 Pedal box
20:25 Summary of differences
22:02 Wrap up
22:12 Links
A copy of Gary VanRemortel XK8 Bible can be found on our website www.modurol.co.uk
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This is not an official guide and is for general information and interest only.
Part of a series of short videos on the experience with maintaining our own cars.
We currently have a 1996 Jaguar XK8 4.0 V8 Petrol, a 2014 Ford Kuga (Explorer) 2.0 diesel and a 2013 Nissan Leaf 80Kw Electric car.
We Current have lots of useful playlists on the @O&DRModurol Channel for these cars.
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[@AndyK.1]

SC supercharged

[@ODRModurol]

Andy, Thanks, missed that reference, went straight over my head, regards Damian

[@tomfurie2996]

Ford parts? They were on a mission to standardize everything.

[@ODRModurol]

Tom, agree, could have been a Ford thing, regards Damian