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Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Hotrodding Basics> how to tell the differance from a 351M&400M
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Topic Review (Newest First)
09-12-2012 10:10 AM
bullheimer you already know that it's time to look for a 351 cleveland
09-11-2012 09:34 PM

Thanks for the info. I will try that this week end.
09-11-2012 04:34 PM
Capstang The only way to tell that I know of is to pull a plug and check the stroke height. There is no visual difference externally between the two.
09-11-2012 09:09 AM
how to tell the differance from a 351M&400M

I have an M class engine and was wondering how to tell what I have? 351M or 400M? Is there a casting number on the outside that would be differant from each engine?

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