65 Dart factory tach

With my 41 years in early A-body and most of that into 1965 Darts I have never seen of a factory mounted tach from factory. I have heard of many ideas that the factory mounted them never got any pictures of it even if I rasked for pictures. But in that Chrysler had cut hole in the plastic to make space for the tach, it would be very time consuming. I find it hard to believe that Chrysler had done that procedure of adding this item. It's more likely that they added in on the floor console for the automatic tranny or on the floor console for the manual transmission cars and it was done by the dealership instead.