To remove the key cylinder you generally need the key for the barrel or be able to get another key to operate the switch by wriggling and jiggling the key whilst maintaining pressure on the barrel turning it anticlockwise. Once you get the barrel turned you can push down the brass terminal on the top of the ignition switch and it will pull out.
If you have no experience with this sort of thing a locksmith will get it out in 2 seconds flat.
Some Fords were a car thief's delight. The dipstick would operate the switch once the cars were a few years old and had a bit of wear in the ignition barrel.
Regards