hello currently working on a 74 pantera with 6500 original been sitting a very long time so some issues i have encountered mainly the brakes.Front brakes where semi frozen back brake i believe to be in working order.front calibers rebulit with very good pistons and slight hone on the bore.when everything was finished nothing but air in the system. so i then replaced the 50 year old master clyinder with a rebulit unit and still air thought the system, my bleeding method at first was the old fashion two person pump and hold,barely any fluid tried the hand pump lots of fluid and air at both bleed valves.the master clyinder was rebuilt using sleaves no leakes though out the system sometime i think the bleed valves are not seating can this be one of the issues.
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