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Old 03-20-2007, 09:28 PM
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syclone?

Thanks for posting those pics of the heads and intake the casting numbers on my 4.3 vortec heads are 10235772 and they wer cast in 1996 I was gonna have them machined for 2.02 and 1.6 valves i have a spare lower syclone intake so i can start drilling and machining without taking the truck apart.How much power did you feel from doing the head swap to these over how the orig heads felt?
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