Clutch still chatters

["Bruce Hevner" <scramblr@xxxxxxxxxxx>]

 >I coming into this rather late, but you DID replace the transmission
>mount, right?  In my experience, that is the leading cause of chattering
>driveline problems on AMCs.

I agree, 
Engine mounts are the most overlooked item in trouble shooting clutch
"chatter". AMC's do NOT have a very good rear mount. It does not do a good
job of limiting rotation of the engine/trans assembly. I kept splitting the
rubber on the left front mount of my SC/Rambler. I used the following to
cure the problem. I attached a small chain to the front of the left (drivers
side) cylinder head. I attached the other end to the frame allowing just a
SMALL amount of slack (you might have to play with this to get it right) so
the engine would idle smooth without vibration being transmitted to the
frame. That ended the mount splitting problem.
But hey,,,, that's just ME!
Bruce Hevner