Hot Rod Forum : Hotrodders Bulletin Board - View Single Post - 1967 400 with 670 heads. Trying for 400 Hp street
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Old 07-19-2012, 07:01 PM
67pontiac400 67pontiac400 is offline
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Casting numbers can't fully be read. This is what I can read 97???78?. The 670 heads have the closed chamber design. I read that the 670 heads do have the new valve angle.
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