Hot Rod Forum : Hotrodders Bulletin Board - View Single Post - 400 chevy short block with 97 vortec heads?????
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Old 08-12-2010, 11:10 AM
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A 400 with flat top pistons and 64cc heads(which the Vortec heads are) will put compression ratio over 11.25-1, way too high for pump gas. Your stock TBI and computer won't like the additional 50 cubes either, you will need a custom computer chip or a chip reflash to even make it work.
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