PJB;
To remove the Ignition Switch (as it is part of the Ign Sw, Armored Cable, Ign Coil Assy), Lock Cylinder and chrome Trim Ring (12) must also first be removed (it does not unscrew, but comes away with Lock Cyl), and that requires Ign Key in Pos 3 and pushing the Retaining Button (it wouldn't be so secure it it could be removed without Ign Key! See below, also:
http://www.sw-em.com/Broken%20Vintag...tion%20Key.htm ). Two screws securing it to the dashboard must also be removed, as you've already done.
bo90; Thanks for reference!
Good Hunting!