You didn't mention if you had a standard (non-adjustable) column or a tilt. Removing the ignition lock cylinder is similar between the two types. Here are the instructions:
Standard Column
http://jimshea.corvettefaq.com/wp-content/uploads/2006/01/StdColumnD&R108JL05.doc
http://jimshea.corvettefaq.com/wp-content/uploads/2006/01/StdColumnACarDisassemblyPage1.doc
Tilt Column
http://jimshea.corvettefaq.com/wp-content/uploads/2006/01/TiltColumnD&R1-23JA061.doc
http://jimshea.corvettefaq.com/wp-content/uploads/2006/01/TiltColumnLineDrwg1.doc
Standard Column
http://jimshea.corvettefaq.com/wp-content/uploads/2006/01/StdColumnD&R108JL05.doc
http://jimshea.corvettefaq.com/wp-content/uploads/2006/01/StdColumnACarDisassemblyPage1.doc
Tilt Column
http://jimshea.corvettefaq.com/wp-content/uploads/2006/01/TiltColumnD&R1-23JA061.doc
http://jimshea.corvettefaq.com/wp-content/uploads/2006/01/TiltColumnLineDrwg1.doc