Yes, doing anything like this by hand would be very tricky. I would attempt with a reamer doing it very slowly and gradually, manually like we used to do valve guides for example, shaving the surface bit by bit, but these are blind bores. Perhaps making an exact guide and attaching the reamer to it would work, then the guide would have to be shortened gradually. Lot's of fiddling around. Perhaps good on a battlefield.
I am usually torn between salvaging and using as much as possible of the original parts if repairable, or getting a replacement. Sometimes it is just better to go for the sure thing and pay the bill if affordable.
Glenn, keep us updated! Thank you
In the meantime I started a thread about front/rear master cylinders in parts section. I found a full service in California for 75-90 USD for re-sleeving. That's way cheaper than 440 or 275! It's called Karps. At this point they are my choice. Good reviews.
Stan
