TR6 Clutch Problems

["Dick" <rjm527@maxinter.net>]

My 73 TR6 was rebuilt from the frame up and since I got it running I have
been having some clutch problems.  After driving awhile I can't disengage
the clutch to shift. Sometime it will clear up by pumping the clutch pedal
and other times I have to leave it set.  Both clutch master and slave
cylinders have been rebuilt.  I first suspected the slave, but last time it
happened I noticed greater play in the clutch pedal which makes me suspect
the master cylinder.

Would appreciate any help or ideas.

thanks,
Dick