[Tigers] Tachometer and Petronix

[Randall Antosiak]

My tach is dead and the repair shop (Palo Alto Speedo) has given me two options for repair: 1) stock electronics ($225), or 2) Petronix compatible electronics ($335) which requires an additional wire from the coil to the tach.  
I seem to recall that hearing that a stock electronics tach will work with an induction wire which has the loop removed (this is the white wire from the ballast resistor) .  Obviously this is the preferable option - does anyone have experience with this?  
Thanks!
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