1965 Dodge Dart Charger

The flat is for emergency brake cable clearance (outside) I believe.
You can check with Accurate on the flat and clamp up/down also

Thanks for the input. I will contact Accurate today to see if they have any answers about this. I also started to contact my old contacts who used to work for Chrysler. Unfortunately they arn't too many still alive today!

I also sent questions to the big dog restorers to get some ideas.

Dan! Thanks for the input. I just did some thoughts about it but you are so true. Facts is what counts.