The drivers door on my 84 Delta 88 will no longer allow the key to go in more than half way. Can a new cylinder be keyed to the old key without the number? Just using the key? I was going to get the cyl number from the glove box lock, but it will not lock, so I can remove it. This is one of my clapped out daily drivers, so I dont wont to leave the door apart while i wait for someone to key a new cyl off the number on the door cyl.

 

Yes, you can have a key decoded, a very worn key makes more challenging but it can be done.Ant lock smith can do this for you or there are a few of us on the site that can do this for you.
Send Joe Padavano a message, he is close to you , he should be able to help.