I don't think the coolant lines are designed to heat up the upper intake. What would be the point of heating it up? Heating the combustion chamber and the cylinder heads would be important (thats why you have a thermostat) but heating the upper intake would serve no purpose other then slightly heating up the air. But the EGR valve is used for that purpose among other things.
Anyone agree or disagree?
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-1993 Mustang, 900rwhp 03-04 cobra based 4v swap, full Griggs setup, project underway
-1994 Ranger w/ 427cid windsor (daily beater)
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