66 Dart master cylinder replacement
I ran into the same problem with the piston and the MC. Just used the old distro block so no problems there. Just gotta be patient and plan on running into snafu's along the way. These cars are 40+ years old and you have to realize that not everything is going to go smoothly on them.
Along with the usual wrenches, sockets and screwdrivers, you need cut-off wheels, chisels, torches and a bfh sometimes to work on these old relics. Dennis