04-14-2009, 06:40 PM
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CC Member
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Join Date: Feb 2008
Location: Jacksonville,
FL
Cobra Make, Engine: Kirkham #570 w Shelby FE
Posts: 1,009
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Not Ranked
Does that cap actually have a PCV valve in it? One thing you could do is replace it with a chevy valve with a breather grommet. The valve has a floating metal plug that gets sucked upwards to block flow under high manifold vacuum. (what you hear rattle when you shake them)
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