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07-21-2011, 03:25 PM
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Veteran Member
Join Date: May 2006
Location: Murfreesboro TN
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Re: GM BBC Intake ?
1263403 appears to be a casting number for the 1263406 and 1263407 intake manifolds. Those are oval port manifolds, so no, they are not the same as a 19131359.
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Alan Roehrich 212A G/S |
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