Need Help - 68 Barracuda Ing Swith Removal

All these switches have a small locating tang in a notch. There is a small amount of movement there. Apply counterclockwise force to the bezel nut while rocking the switch from behind will often promote loosening.
Please note.. With other stiches the little rotating movement isn't an issue. It could become an issue with ignition switches over time if the nut isn't well tightened to prevent repeating movement.