05-17-2020, 04:33 PM
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Half-Ass Member
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Join Date: Jun 2005
Cobra Make, Engine: ERA #732, 428FE (447 CID), TKO600, Solid Flat Tappet Cam, Tons of Aluminum
Posts: 22,005
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Not Ranked
Just pull the fuse that feeds the dash gauges and take her for a spin. IIRC, that tach wire is just a 12v square wave.
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