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I have a 70 SS with no tach.I am wanting to change to the tach gauges.Is this as simple as unplugging the harness from my old gauges and plugging it in to the tach gauge or is the wiring different?If it is different were can I get a wiring diagram.The diagrams I have don't seem to show the tach.Thank you.
Randy
 

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Requires mods to the dash harness and adding two wires for the amp gauge to the forward light harness. Go here for the details http://www.endrud.net/gauges/. This works for 70 and early 71 but the 72 harness is definatley different at the bulkhead connectors. I have done several and if you are comfortable with wiring it is pretty easy.
 
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