Clutch bleed...

["David Mayer" <celiracer81@hotmail.com>]

What is the most any of you have had to bleed the clutch system?  I have bled
mine twice since installing my new clutch and for some reason it still isn't
releasing the clutch.  I guess i'm not getting enough travel.  I talked to my
mechanic and he says that he has sometimes spent HOURS bleeding a clutch!  How
are our Master cylinders for bleeding?  is it necessary?  How do you do it?

Thanks,
  Dave
'68 Spit in bits...again