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Old 11-18-2012, 07:59 PM
632Mantis 632Mantis is offline
Bye Jerks
 
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Stock 400 heads are notorious for cracking.

You can run these, but you will need to drill some steam port holes in them. ( Or let your local machine shop do it. )

Summit Racing® Cast Iron Cylinder Heads for Small Chevy SUM-152123 - SummitRacing.com
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