I'm in need of ignition switch help. i have a 65 cutlass. i have the original keys, the ignition key fits the doors and glove box, but it won't turn the ignition cylinder. i believe it isn't the original tumblers. key goes in I have the knockouts still in the key, need to get tumbler to get coded for my key. but the tumbler set is in the switch and can't come out without the key. thanks in advance