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Old 06-15-2007, 04:17 PM   #11
krue
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Join Date: Mar 2003
Location: South Mississippi
Posts: 36,448
Re: How do I know for sure if dad's 84 c10 has a th350 or 350c?

Look in the Index link in my sig, there's a diagram for the lockup wiring, it uses a vacuum switch and a brake pedal switch iirc.
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