Hi Frank,
the threat M60 pointed to was the writeup I used. If I remember correctly, there are also youtube videos showing how to grind the locking pin down if your key never turns. I was just lucky mine turned so I could get it out easily. I think the second time the key got stuck was due to the shift lever interlock that attaches to the bottom of the ignition switch - there's a green lever that moves to lock the key in, but may also prevent the cylinder from turning. If your key won't turn, before you grind away, I would detach that interlock, and tap lightly on everything to see if you can't jiggle it free.
Good Luck, sincerely
-Jerry