Thread: Pontiac 400 - Casting Number 500557
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Old 05-25-2012, 08:44 AM
74Grandville 74Grandville is offline
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Join Date: Mar 2003
Location: Plainville, CT
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I read to keep the power below 375hp with these blocks. looks like you were over that. DD shows around 450hp at 6,000 rpm

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