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Thread: Gen V BBC head question
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12-23-2009 #1
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Gen V BBC head question
I recently purchased a truck with a gen V 502ho (450hp) GM engine. The engine part number is 12568778, cylinder head number 12562920. I am looking to upgrade the heads but I am not sure if I need to use an adapter head gasket to run earlier mark IV heads? Is there anything else to watch out for before a head swap?
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