Here's the info from the MA instruction sheet for R&R #12412 Power Window Ribbon:
Removal
1. Lower the glass slightly
2. Disconnect Battery
3. Remove armrest
4. Remove speaker grille
5. Remove door trim panel
6. Dissconnect the wire harness connectors at the rear of the inner mounting plate
7. Mark the position of the guide bolts and remove the mounting pate to door screws
8. Remove the bolts holding the motor to the plate, the guide to the plate and the guide to the door, then remove the guide
9. Disconnect the rods at the remote lock and lock actuator
10. Push the mounting plate down and pull the top out to gain access to the remote rod clip. Remove the remote rod from the plastic guide
11. Disconnect the window regulator motor electrical connector
12. Pull gthe inner mounting plate out of the door and let it hang from the lock rod at the rear of the door
13. Remove the two weatherstrip screws at the window opening in the door
14. Mark the position of the glass stop bracket and remove the bracket
15. Loosen the anti-rattle pads and move them as necessary to allow the glass to be removed
16. Remove the regulator to glass nuts and pull the glass up through the top of the door
17. Remove the five regulator bolts and remove the regulator
18. Installation is the reverse of the removal procedure. If the motor need to be replaced, drill out the old rivets and pop rivet the replacement to the regulator
Replacement
1. With the regulator assembly removed from the door, drill out the rivets. With allen wrench remove the ribbon bolt
2. Pull window ribbon toward the top of track and remove
3. Cut window ribbon to length (91 teeth), apply lubricant to ribbon and track (preferably white grease) and slide ribbon onto track. You must connect connector wire to Corvette power window wiring support install bold. Now pop rivet or use small nut and bolt to attach ribbon track to track support
4. Reverse removal procedure to reinstall window regulator. With time and care your reassembly will not be difficult and you can say with pride you did the job yourself (this is a quote, I didn't make it up!)
Hope this helps. If I had a scanner that worked, I would scan the whole sheet with pictures, but alas, it won't work with windows XP.
Zora
P.S. I've never done this, but when I bought an 84' manual from a friend, this sheet was in the book. Hope I never need it! Let me know if you would like the pics, and I will find someone to scan the document this weekend.