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Old 05-05-2008 | 12:18 AM
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are the 706 casting 5.3 heads good?
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Old 05-05-2008 | 01:28 AM
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Just a standard 5.3L heads as far as I know.
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Old 05-05-2008 | 11:08 AM
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they are the stock heads on a 5.3...
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Old 05-06-2008 | 10:29 PM
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are they worth porting or should i just get aftermarket?
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