replacing a ignition switch lost keys 67'

Hello guys new here 1st post hopefully you all can help. I just bought a 67' barracuda fastback /6 for $900.00. Has no keys and I bought a replacement set for ignition, doors, and trunk. How do I go about replacing the ignition tumblr on the dash. I tried pushing the little hole under the dash with a small screw driver and forcing it out. But i read somewhere that I need the key to turn it to get it out. But don't have one. Thanks guys.