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I am setting up my 260Z for racing and I'm planing my cooling system. The question is, on the right rear side of the head, there is a water outlet fitting that appears to go to the heater core. Can this be capped off or does it have to run back to the block at the lower radiator hose/ engine block connection?

Britt

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https://www.classiczcars.com/forums/topic/3535-e-88-head-question/
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