I am changing the ignition switch on a 1963 Chevy truck. I can't get the key tumbler out of the old switch. I know there is a small round hole there that you stick a wire or something in to get the tumbler to come out. I'm sure it's pretty simple if you know the trick to it. Does the key have to be in any certain position, off, on or start? Is it best to use a drill bit or wire? Does the drill bit or wire have to be smaller than the largest size that will fit in that hole so it can be worked to the side? Any advice appreciated. Thanks.