Gauge recalibration?

Hey All,

I have a question, i have been restoring some of the parts on my stang and iv noticed the tach is way off(idles at 0 RPM) and the clock is not working and also i put new bigger wheels on my stang and need the gauges either recalibrated or fixed, i don't want to get new ones because these are the original and are in good shape, so if anyone knows a quality shop where i could have this done could you tell me some of them i would be very appreciative also i heard that the clocks are always breaking but some people put a quatz system in anyone know of a shop that dose that?

Steven

PS i was also wondering how i would go about finding how many other mustangs were made to the same specs as mine, and how many GTA's there were. Any info helpfully