Where is the Best place to attach the wire to tach


Dragway Regular
Mar 6, 2014
Mountain Home Id
I have a 78 El Camino that I'm wiring in a Rostra cruise control. Where is the proper place to wire the Rostra cruise to the tach? I don't want to mess up the tach or the cruise control.


Daily Driver
Jun 2, 2019
White wire going to your distributor. (Or the one that isnt pink) thats your tach signal. If you dont have the tach option it would be the unused pin. Assuming you have an HEI
Last edited:

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