Joe,
I just looked at the well nuts on my 66 and they are the same size as the one in your pic. In fact, they appear to be a bit smaller. I can't say with certainty that they are the originals but I know they haven't been changed in the 23 years that I've owned the car.
I just looked at the well nuts on my 66 and they are the same size as the one in your pic. In fact, they appear to be a bit smaller. I can't say with certainty that they are the originals but I know they haven't been changed in the 23 years that I've owned the car.