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Old 08-21-2024, 08:52 AM   #6
Dwight Southerland
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Default Re: 1973 454/245 update

Adger,
I keep a pretty good history of changes to the class guide and the blueprint specs since I started my website to be able to track changes over time. The Edelbrock heads and the the 391 GM aluminum head were added to the class guide in 2021, so that's not new. The 049 and 292 GM heads are in the 2006 blueprint specs, so that's not new. Not sure what NHRA's announcement is about unless they have not accurately published the change they are referring to (which is not new either!).
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