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1968 Firebird engine code help

 
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spirit firebird



Joined: 26 Apr 2019
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PostPosted: Fri Apr 26, 2019 12:45 pm    Post subject: 1968 Firebird engine code help Reply with quote

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Can u guys tell me if this is the correct motor for my 68 Pontiac firebird thought it was a 400 but codes I have seen say 68 428?

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Larry
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Joined: 01 Jun 2006
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PostPosted: Fri Feb 28, 2020 11:43 am    Post subject: Engine Code Reply with quote

Sorry to miss your question.

Our engine code article at: http://www.pontiacregistry.com/members/online_magazine.php?view=1&article=243 verifies your thought... 1968 375hp 428. A powerful engine for sure.

Have you checked your VIN on the engine also (below these numbers that you show)? That would at least help identify what car this engine came from. The top number is supposed to be a casting code.

Below is the engine code info from our magazine article mentioned above. As you can see, there are a boatload of 400 codes as well as the YH shown as the 428.

Please let us know what you discover.

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