Then key broke off in the tailgate lock while the tailgate was open. I accidentally hit it with something I was loading in the back. It was not all the way in the lock when it broke off. I have removed the tailgate lock, and new ones are available. But, it was my only key. So now I have no ignition key, and cannot turn the ignition switch, which is required to remove it. My main issue now is getting the ignition lock out. There is probably a code on the outside of the cylinder, but once I get the whole thing out, I was going to replace the whole thing with one from CARiD. Yes that means having multiple keys, but that is ok.
I am familiar with locks and how they work. I work for a city building and facilities place, and have rekeyed many residential type locks. Just sticking a drill inn there and running it as full speed will cause it to hang up and break something. You have to go very slow and take your time. I do not have another original old Ford key. I have a key for my 1964 Fairlane, but it is a replacement, not original Ford. But I don't understand how that would work. The tumblers have to line up, and only the key that the lock is keyed for will do that. I'll give it a try anyway. If I can just get the entire lock assembly out, I'm in the clear.
I was able to get what is left of the original key out of the tailgate lock, but I'm afraid to put it in the ignition lock. I might not be able to get it out, and it would complicate drilling out the lock.
The rear lock, door locks, and ignition lock all used the same key. I've never had anything but that one key since I got the car.
Thanks for all the responses. They are much appreciated.