Hot Rod Forum : Hotrodders Bulletin Board - View Single Post - Installing roller cam in Vortec 400SBC
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Old 03-05-2013, 05:57 PM
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Hogg, You really need to run about a 20-22cc dish piston in that combo for a more fuel friendly 9.5ish CR.

Flat tops will put you over 11:1 with a 4.155 bore and 64cc chambers. Most production Vortecs run in the 62-63 range.
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