I would suggest that you take digital pictures as you disassemble the column head. I would also urge that you remove the column from your car. It will be a lot easier to work on. You are going to have to remove the turn signal switch from the column so that you will be able to remove the turn signal housing and the shift bowl. The shift bowl should be a slip fit to the shift tube inside the column. Corrosion may make it somewhat difficult to pull it off. Be careful with the disassembly. The shift tube is made of two thin wall tubes that are held together with injected plastic. You do not want to disturb the plastic!
These two disassembly pics should help.
http://jimshea.corvettefaq.com/?p=698
http://jimshea.corvettefaq.com/?p=702
Jim
These two disassembly pics should help.
http://jimshea.corvettefaq.com/?p=698
http://jimshea.corvettefaq.com/?p=702
Jim