Is there a site somewhere where it takes you through the steps of adjusting a clutch? My clutch pedal is all the way out to the end (no play) and chatters when taking off either going forward or back. The car had a new GM clutch installed in 2000. It is an L78 engine and M20 transmission.
Thanks,
Al Barlow

Your supposed to put the clutch rod in the hole on the pedal closest to the engine I believe. My car is a 68 so it doesn't have two holes. So I might have it backwards. Then you adjust the rod by the fork until the throw out bearing just contacts the fingers on the pressure plate. Then just swap the pedal rod to the other hole and you're done. That's for a stock diaphragm clutch.
See this link for the other stuff to check.
clutch adjustment (http://www.chevelles.com/forum/ultimatebb.php?ubb=get_topic;f=28;t=003641)
Since your out of adjustment, you probably glazed the disc. So now it chatters. It might go away after you adjust it correctly. It could just be getting hot do to the adjustment problem. If not, you'll need a new disc at least.

Al,
I always adjusted the clutch by "feel". If you reach into the car and press on the pedal with your hand, it should move about an inch before you feel a lot of pressure. The first inch will just be the pressure of the pedal spring. This is what is meant when they say that they want one inch of free play. As the clutch wears, this free play will go away and require adjusting. Once you drive it for a few miles you will be able to tell with your foot that the free play is gone. If you continue to drive the car with no free play in the pedal, the clutch will not be engaging completely and will slip, eventually (sooner than you think) burning itself up. The "harder" you drive the car, the sooner it will kill the clutch. Back in the mid to late 70's when I was racing my Chevelle almost every other weekend, I was putting clutches in about once a month. They have gotten better, but will still wear out under hard action.
By the way...the ONLY time your foot should be on the clutch pedal is when you are shifting or starting and stopping. If you ride the clutch all the time, or use it to hold yourself on hills etc...it will kill it.
Hope this helps,