I know the ones you buy at the McPart stores have 2 ports, one that gets capped off on my 84 GT. But in images of low mile engine bays or pics from when they were new, i see single port PCV valves on carb 5.0s. I'm assuming the newer 5.0s need both ports so they just make one PCV for the parts stores. Does anyone have a part number or know where to get an original type?
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