The old car has been sitting a few years. It has stock drum brakes and single reservoir master cylinders.
I was trying to remove and clean the MC and noticed the outlet line hex nut coupling was stripped, someone had used pliers to attach it. The head was rounded off with "tooth marks" all over it. When I grabbed and twisted with my pliers, the entire coupling broke off, leaving half of the threaded coupling sheared off in the master cylinder.
The NABCO 7/8 cylinder uses a large iron adapter that screws in from the side. Then the small line coupling threads into the la