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Old 02-15-2010, 12:04 PM   #1
lyrikz
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Join Date: Sep 2007
Location: monroe washington
Posts: 3,052
Ported vs. non ported vacuum?

Can someone explain that? I have a stock rochester quadra-jet on my truck and for my HEI dist. i need PORTED vacuum. How the heck can i tell if its ported or non ported?

Whats the definition of manifold vacuum.. Basically just like it sounds im sure.
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