My buddy with the 1980 TA had a bad master cylinder at his home in Holbrook. No one would do it [remember the trustworthy shops on LI thread?] . I said I would if he drove in to get me the 1.5 hours it takes on the LIE. I bench bled it for him down my basement, on my bench. He was in Queens here for work so he picked me up and we went. Once there it only took half an hour to swap masters, and I squirted brake fluid into the ends of the lines to flush out air. Once hooked up, I loosened the lines at the cylinder and had him press the brake pedal so I could bleed them at the fittings. After that he had a good hard pedal. No need to bleed the entire system. Then another 1.5 hour drive home. At least he had AC!