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There is no need to bore a new block to the maximum. More than 4.31 canīt be done with an genesis or pond aluminum block I think.
With an aluminum block > go with 482 CUI (or 468 CUI if you prefer the shorter 4.125 stroke like me).
With an iron block > same as aluminum or 496 CUI (4.31 bore / 4.25 stroke).
Greetings from germany, Stefan
Last edited by silverline; 03-28-2010 at 02:32 PM..
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