In addition to the above good advice, when you first start with a clutch bleed, there is no pressure and you have to lift the pedal each time for each pump for a while. Give it like 10 pumps between opening and closing the bleeder. Pressure should build during the bleeding process, still lifting to pump, but less. By the time you're done, it should feel firm and return with each pump. Finally you adjust your pedal just a bit to have it engage/ disengage at the right time per FSM page CL-4. The proper procedure is in the FSM on page CL-5 and works every time for me. If the booster piping is gone, skip that part of the bleeding, still works according to instruction.
http://www.nicoclub.com/service-manual? ... sx/1995/CL