[solidaxel]

My Vintage Air pics did not look like those you have.
I placed the rear evap. bracket on the evap. and raised it into the location in back of the glove box and had someone mark the hole on the firewall where the bracket hit the firewall.
Make sure there is enough room for the defrost hoses and wind/sh. wiper arms there will be some of the evap showing under the dash when it is high enough.
When you leval the evap. make sure it is "tilted" a bit to the right to drain the condensate from the bottom hose fitting.
With that in place you can remove and attach the bracket on the right side and mark where you need to drill another hole for the bracket. Best to do this before paint so you can weld a stud to the firewall to make the install easier AFTER paint.
The front bracket will bolt to the lip on the glovebox lower edge