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Old 02-07-2014, 05:16 PM   #26
litew8
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Join Date: Jul 2011
Location: Des Moines, Iowa
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Re: Picture request - factory vac gauge connections to the back of the dash

I agree with all the above comments. I'd suspect that the OEM vacuum on heavier ton trucks were used primarily to ensure good vacuum for braking and not so much the engine itself. That's not my intent. Mine is to monitor engine performance.
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