Sheptrans sells upgraded brass bushings. Most of the time when the 1g clutch linkage goes it it's because of the arm that attaches the huge spring and the pedal to the master cylinder. They typically round out and cause a hourglass shape in the rectangle key hole. You'll see what I'm talking about if you research it a little or rip it apart.
Here's a link to the bushings. http://sheptrans.com/products/dsm-aw...edal-bushings/
He also rebuilds them and welds the linkage together where I said it usually rounds out at. It doesn't cost to much more but there is a core. All I did was take the linkage arm out of a non turbo and put it on mine deleting the spring and it worked perfect.
But when you rip it apart take a look at it to see what your real problem is.
EDIT: When I had problems with my clutch linkage I would have to pump the clutch or slam on the clutch pedal to get it to fully disengage. It also usually had problems in reverse and 1st. Occasionally 2nd.