Tach Potentiometer

["Ed E. Powell" <102430.3640@CompuServe.COM>]

>>all I had to do to make the tach work with the dual-point distributer 
was to adjust the potentiometer

Great!  That's what I need to do.  My tach reads high all the time.  Just one
problem.  Uh, where do I find that potentiometer, in the tach or elsewhere?

Giant thanks,
Eddy