I have complete instructions on replacing your ignition switch and id you have to, the plastic sector gear. It makes a difference if you have a T&T column or if you have a standard non-adjustable. The T&T is just a bit more complicated.
On the T&T, if you replace the sector you might just as well replace the little die cast rack that the sector mates to. The rack is usually the thing that breaks.
It will be best if you pull the steering column out of the car and place the column in a vise in order to have more room to work.
You will need instructions 1,2,& 3 along with the pictures 1,2,& 3 that go with the instructions. (Again either T&T or standard). There are also blowup drawings as well.
They are all posted at www.corvettefaq.com
in the Steering Section.
I am sure that we can walk you through the column and switch repair if you have the time.