Datsun 720 Clutch stays engaged

[Skotty]

I just finished replacing the clutch in my 81 720 pick-up, everything was working fine until the other day. I put the truck in the garage, and then went to move it out, and the clutch will not disengage. I bled the cylinder and it seems to move the withdrawal leaver the distance it should while the pedal is pressed. The gears shift fine when the engine is off. I do not know where to begin to look without having to pull the transmission out. I have a feeling it has to do with the withdrawal leaver as it is not moving the releasing bearing enough distance.