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Providing that you have a stock Vehicle ignition system, we just put a tach on our 90 350 and there are two plugs on the coil, a single wire comes from the fire wall, the other has two wires and comes from the dist, out of that plug there is a short wire pig tail that is just hanging there and it has a protected male terminal on the end of it , plug your applicable tach sensor into that connection and follow the tach install instructions to hook up your lighting and ignition wires. Most new tachs come with installation instructions. Happy Reving

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17y ago

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