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What is that....

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07-30-2013, 09:44 AM	#1
tex_waco_usmc Project Heaven in my 67!!! Join Date: Jan 2009 Location: Bosqueville, TX Posts: 899	What is that.... On the back of the speedometer on an 87 there is a set of wires that go into a small green box that has a circuit board in it. I replaced the dash with a 91 Tach Dash and it doesnt have it. What is that doohickie and do I need it???

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