CLASS RACER FORUM - Rule of thumb for a big Chevy

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TomCannon

12-15-2010 08:03 PM

Rule of thumb for a big Chevy

About how big can you safely bore a production line 427 or 454 big block Chevy? Anybody have any sonic numbers floating around?

Alan Roehrich

12-15-2010 08:04 PM

Re: Rule of thumb for a big Chevy

Almost any will go to 4.340", many will go to 4.375". Especially if you pour the block first.

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