Thread: 1969 L78 396 375 HP Dyno Test
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Old 10-01-2015, 07:51 PM
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Default Re: 1969 L78 396 375 HP Dyno Test
In as-delivered condition with manifolds, I'd say the factory 375 HP rating was fairly accurate. Headers are typically worth ~30 HP on these engines.

Read this and note what JRSully stated on the last page.
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