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Old 01-05-2016, 10:17 PM
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Adam Adam is offline
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For a lot of cars horsepower numbers peaked in 1970. If you look at the Buick, the first year for the big block was 67 - in the big cars it was a 430 from 67-69. 1970 was the first year for the 455, and the 455 continued up through '76. I think only the '70 455 (given we're talking about engines that are completely stock) is said to be hotter than the 430s. The Buick 455 slowly declines in power from '71 through 74, but didn't really loose a lot of power until '75 which was the first year for the catalytic converter (and crappier low compression heads).
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Last edited by Adam; 01-06-2016 at 03:04 PM.
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