Keys can be cut to a cylinder number, but there is no guarantee it will work in that cylinder now because the pins in the cylinder wear over time. However, it's still worth a try, and if it will not open the cylinder, you can have the cylinder pins changed to fit the key.
EDIT: I started this post before Terry posted, and got sidetracked with something else, them came back and posted, so I am sorta repeating some of the same things he said.
PS....Originally, the ignition lock cylinder and passenger door lock cylinder are usually keyed the same. On my 35 avatar, I could not get the ignition key to work in the door, so I removed the door lock cylinder and had a locksmith make a new key to the numbers on that cylinder and it did not work. So we sprayed some sort of cleaner into the key opening and gently worked the key in and out, and side to side in the cylinder, and the lock began working intermittently at first. The more I worked with it, the better it got.
