67 also the Ignition and Doors should be the same. And the Trunk and Glove Box. My car has all the original Locks, and 1 set of original keys. There is a 4 digit code #L##, #=number L=letter. A good locksmith can cut you a set of keys from just the code. As has been stated, it has to do with the grooves, if the Ignition key will go into the Door locks (or vice versa) then yes they can be recoded to match. Also all of the locks and original keys have this 4 digit code stamped on them. I would recode the Ignition to match the Doors, that way you are only recoding 1 lock. If you recode the doors to match the Ignition, then you have to do 2. Just my 2c's.