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Discussion Starter #1
thought 351C 4V head guys would get a kick out of this...

... 1970 351C 4V factory STOCK internals engine refreshed dyno pull ... [email protected] ... [email protected] ...

[ame]https://youtu.be/ggaoKDn7KDI?t=599[/ame]

funny that FORD only rated this 4V eng at 300HP
 

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Second look brings different perspective. It barely makes not quite 1hp/cubic inch. You could either see that as a "meh" moment or you could say for a factory iron intake and heads with OE exhaust manifolds and stock-ish compression that's pretty good.

And I concur with the above.... what change would a matched cam and headers bring to the dyno?
 

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Discussion Starter #7 (Edited)
here's another related/interesting comparison about 4VB head flow...


& another interesting/related 400M eng one on 4V head flow...

 
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