Rule of thumb for a big Chevy

TomCannon · 12-15-2010, 08:03 PM

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

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

12-15-2010, 08:03 PM	#1
TomCannon Junior Member Join Date: Dec 2010 Posts: 4 Likes: 0 Liked 0 Times in 0 Posts	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?

12-15-2010, 08:04 PM	#2
Alan Roehrich Veteran Member Join Date: May 2006 Location: Murfreesboro TN Posts: 5,097 Likes: 1,542 Liked 1,775 Times in 404 Posts	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. __________________ Alan Roehrich 212A G/S