[SunSoaked]

I got the sure fit in my 85. Currently got the dash apart installing Dakota Guages.
If Vintage uses the same controller for 73-91 then something isn't right with your dash. Is your bezel original OEM?. It looks installed correctly, it goes on the front like you have it. If they send you 20 new controllers, I'd bet they all fit the same.
Push come to shove, you could trim the depth of the tabs to recess it further.
And no, the hot and cold is not backwards as someone mentioned. The system uses a heater bypass solenoid and that's how it's designed.
When you get it finished you will love it! It works great here in S.Az even when it's 120.