Older Dura-Ace stuff had compatibility issues with other Shimano stuff.
There is a great deal of confusion relating to this.
I've created a new Web page to help clear this up. See:
http://sheldonbrown.com/
Sheldon "FAQ" Brown
+-----------------------------------------------------+
| It is undesirable to believe a proposition when |
| there is no ground whatever for supposing it true. |
| --Bertrand Russell |
+-----------------------------------------------------+
Harris Cyclery, West Newton, Massachusetts
Phone 617-244-9772, 617-244-1040, FAX 617-244-1041
http://harriscyclery.com
Hard-to-find parts shipped Worldwide
http://captainbike.com
Useful articles about bicycles and cycling
http://sheldonbrown.com