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Hi, I having trouble getting my tach to work on a 1983 mustang, I bought a ford crate engine that has a MSD distributor and i bought a 6AL ignition box, car has the duraspark box, I was told to buy the Tach Adaptor 8920 but tach still doesnt work, does someone have a wiring diagram or more info that shows the exact wiring that includes the duraspark box, any help would be much appreciated , i know its something small im doing wrong
 

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No reason to have the DS box in there. Run just the MSD distributor, 6AL for multi-spark CDI, and tach adapter. If no joy, disconnect the 6AL and run it from the distributor only, to verify the tach is wired right and working at all before pulling your hair out.

David
 
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