66 Barracuda A/C vent to dash dimension

I have a 66 Barracuda AC dash in my 65 Dart wagon. Those 2 bolts are the only fasteners that hold the 65/66 vent in place. I can get the distance between the 2 bolts but likely will be several days before I can do it
I'm not in any hurry, I can wait. Can you also tell me on the dash how far up the bolt is from the under side of the dash?
Thanks