Some tachs require a small resistor in the trigger wire. Ran into this problem w/Sun mini tach, contacted Pertronix and was given a part number from Radio Shack. If unable to get correct resistor, PM me w/address and I'll send you one of my spares. I am no longer working on customer's cars and my mini tach is now fed from HEI and of course Corvette is mechanical, so I am set.
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1978 Trans Am WS6 Original owner
1934 Chevrolet Master 5 Wdo
1964 Corvette roadster loaded including A/C
1964 Chevrolet Suburban/Carryall 4X4
1972 Chevrolet C10 "Highlander"
1978 GMC Jimmy 2WD Slammed SOLD!
1992 Pontiac Grand Prix coupe
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