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Thread: vortec head modification for .480 lift
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Old 09-26-2011, 04:13 PM
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cobalt327 cobalt327 is offline
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Never tried this, but someone said the solution is to remove the factory posi lock valve seal and replace with an '86 Daytona 2.2L turbo umbrella style valve seal. Supposed to allow for over 0.500" lift...
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