"Ian, if you go back up and follow the links to the information provided, you will find most if not all data you need. Please bear in mind it isn't only the piston bore size which matters, but also the dimensions and shape of the cylinders which have to fit the brake backing plate."
Thanks Hanno,
Well I am exploring the possibility of shifting to
modern alternatives and the backing plate can be easily modified to fit a wheel cylinder. i.e. welded up and re-drilled if need be. I am then not restricted by the shape or fittings as these are the main issues with remaining in current configuration. It is very restrictive and an alternative may be possible.
Nothing ventured, nothing gained. I have a ways to go before I hit this part of the restoration.
Cheers,
Ian