How To Remove a Mustang Ignition Switch : Average Joe Restoration
To remove the ignition cylinder from the assembly you will need the ignition key and a large paper clip. Bend one end of the paper clip straight, put the key in the ignition, turn the ignition switch to the accessory position, insert the paper clip into the small hole, push inward and then turn the ignition switch again counter clock wise and pull out the cylinder.
Worked for me, took a feew tries and yes it can get frustrating the first few times you do it.