tactmeter

1. Does the tactometer in these cars wear out?
2. Are there replacement tact meters for the 3000GT?
3. Does wear on the engine makes the tact meter not read the RPMs of the
motor?
4 Where can I find a new tact meter for our cars?

They don't normally wear out, but I guess its possible. I saw your post about changing the crank sensor, and it is possible a faulty one could cause issues with the tach.