I do know that the older PATS style key is not interchangable with the newer style that has a different shape. The newer Ford key is known as a "jewel" key and has a blue oval Ford emblem on the head (the "jewel"). I made the mistake of having two keys cut for a customer without asking what the old ones looked like and they would not program.
Horseydug, do you have something against Lincolns?
