From the interior picture, I'd say it was a factory AC car as it has the factory heater/AC controls. Don't see the AC vents but that's just a bolt on to the lower dash. A picture showing the right side under dash would show whether the factory AC stuff is still there.
Numbers matching didn't start to 1968 IIRC. Best you can do is casting dates a month or two or three prior to the build date of the car that would be shown on the fender tag.
