Tom, I put an intermittent wiper assy into my 63 Ranchero and had the same issue you describe with that switch. Never tried a 2-speed switch either, since I wasn't going to use one. It came with single-speed so perhaps a 2-speed switch would have hit too. It is the hole on the left-side of the column, right of the ignition switch. I got mine to fit by using a long drift and massaging the bolted in brace where the switch needed to be. I had the drivers door off at the time and was able to go in with the drift punch from where the door hinge bolted. How I would do it with a dash full of stuff or with the drivers door on, I don't know. I know I'd figure it out, but it took some force to divot the brace enough to accept the size of the switch.