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Old 03-16-2008, 04:49 AM   #1
69heavychevy
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Join Date: Jan 2007
Location: Garland,TX
Posts: 431
edelbrock performer rpm???

i was cleaning up the manifold before it went back on the truck. i started picking at what i thought were clogged coolant passages on the rear. well it turns out the are actually blocked off. i found when i started drilling and hit a aluminum wall. are they supposed to be like this?
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