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Unread 12-02-2009, 05:05 PM
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Join Date: Oct 2006
Location: Raleigh, NC
Posts: 6,192
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OMC used to offer a thicker than standard head gasket for some of their motors for comercial use or when using lower octane fuel, I don't know if they are still available, but it would be what you need after decking the block.
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