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i'd just love to see some self professed expert's face at a cruise-in when i showed him my 440 hemi.



All you have to do is bore the 426 block .070 over , it's 440 cubic inches ... but I get what you are saying.



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From their webpage:

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The intake port openings on all Conversion heads are 10% large than stock for enhanced breathing and stock Hemi manifolds bolt right on.





i read that, but i wasn't sure if it was exhaust manifolds or intake or both.



Both , BUT I don't think stock exh. manifolds clear the wedge mount ears , at least on the driver side .