291 LS-5 bbc heads

Old 11-18-2011, 04:33 PM
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ejm
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Default 291 LS-5 bbc heads

what are these heads and are they decent bbc heads
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Old 11-19-2011, 08:18 AM
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oldandtired
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Default Re: 291 LS-5 bbc heads

Originally Posted by ejm
what are these heads and are they decent bbc heads
3964291 are 69 to 70 109cc closed chamber rectangular heads.
396/402/427/454/with 13/16 or 5/8 spark plug (gasket or tapered).
Hard to get good flow around the valves with the "bathtub" chamber.
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Old 11-27-2011, 04:05 PM
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ejm
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well got motor home and they are 3964292 bbc heads just wondering if they are any better and what they are
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