My husband and I have had a big headache with the ignition switch. We bought a Haynes manual and had no luck with their description on how to remove the ignition switch, and everyone said to remove the steering wheel. However, after buying a Chilton's manual and our mechanic changed it out for us, it's not as hard as we thought.
1. Disconnect the battery ground cable.
2. Remove the turn signal switch.
3. Insert the key. Position as fillows:
1976-83 With the manual transmission, put it in the ON position, with automatic, put it in the OFF/LOCK.
1984-86: Two dent positions, clockwise, beyond OFF/LOCK.
4. Working through the slot next to the turn signal switch mounting boss, use a thin screwdriver to release the lock cylinder.
5. To install, insert the key in the new lock cylinder. Hold the sleeve and turn the key clockwise until it stops. Align the cylinder retaining tab with the housing slot and insert the cylinder. Push the cylinder in, rotate to engage, then push in until the retaining tab engages the housing groove.
6. The rest of the procedure is the reverse of removal.
This is from "Chilton's Manual". I wish I had know before I took it to my mechanic. We could have done it ourself.
Hope it helps.