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Generation III Internal Engine 1997-2006 LS1 | LS6
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Which head gasket?

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Old 09-30-2011, 07:26 PM
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Default Which head gasket?
Quick question, buddy is building a 5.3 with milled .030 243's ...does he need to buy head gaskets based off of the 5.3 block or the 243 heads? Thanks!
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Old 09-30-2011, 08:19 PM
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He must go off the heads.Your gasket should be as big as the bigger of your blocks bore or the heads chamber.
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Old 09-30-2011, 11:23 PM
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Right, you don't want the gasket hanging over into the combustion chamber.
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