I´m sure the face plates could be swapped but then again I didn´t dare. There´s lots of fragile components adapted and most of all I didn´t want to open the silicone sealed tach from PY. Perhaps I´ll do some day... Now that I know how to open them and how it looks inside it should be no big thread -- except preventing the indicator from getting bent or broken off...
BTW - I´m running it with an Pertronix upgraded points distributor - now being pointless but still showing the correct look. No issues so far...