OK. Slowly moving forward here... Have discovered a couple of missing vacuum lines (go figure!), a leak around a coolant intake that may take a new part, and I'm about ready to put in a windshield... Can anyone tell me who makes the best windshield gaskets? I'm hoping to only have to do this once...
Oh and as payment for your time and opinion...
View attachment 53801
I haven't taken a close look yet, but I believe the plate was removed and then re-revitted back to the firewall NOT using the original holes.

All of the numbers match, so it's original. but it looks like the overlap over the cutout on the right matches the lineup of the smaller holes underneath.