ignition switch removal

This should be easy; but I've got a problem. The whole dash of my 66 chevelle is out and staring me in the face. I am trying to replace the upper dash strip. Light switch, wipper switch and lighter switch came out like a breeze. For some reason, don't know why; but I am having trouble with the ingnition switch. The Ingnition Switch nut come loose; but won't fully come off the Switch. Don't know if I have the wrong nut, or switch or both and someone jamed them together. Or Am I missing something obvious. At last resort I suppose I could cut it off and buy a new switch nut and a new switch? Help