clutch adjustment problem

If everything is good with the linkage (no worn parts, cracks, etc..) I'd say the finger hight is a little off in the pressure plate. Try tightening the finger pivot nuts on the pressure plate (the three large nuts between the sets of spring pockets) about a quarter turn each until you get the clutch to disengage where you want it. Also make sure all three fingers are adjusted to the same hight against the throw out bearing or you will have chatter problems.