upgrade master brake cylinder

15/16 new Raybestos - disc/drum
Straight bolt on, no fuss.
Same part # at most auto supplies.

RAYBESTOS MC36406 Master Cylinder | RockAuto

No fuss? The wire clip top and cheap bushing leaking brake fluid all over the place and the cast iron flash rusting a month after it's installed is no fuss? Not in my book. And $60 from RockAuto + $15 or more shipping doesn't save much over a new master cylinder and the adaptor from DoctorDiff. Also way easier to hook a pressure bleeder to the new style master cylinders, makes bleeding them a 5 minute one person operation.