Here is the way the bracket will be mounted.
Gauge with angle bezel temporarily in the bracket:
Not going to get any further without borrowing a friends shop and tools or waiting 'til January when we close on our house in CR. I miss my garage...
I have two move of those angle bezels so I will shape one to the contour of the dash to the left of the wheel AND use it as a template for the hole once I get it shaped the way I want it. The dremel will join the party when I get to that step.