Senior Tech Team
Join Date: Nov 1999
Location: Whittier, California
Well, think about the 4.470 bore block, and the 4.500 Merlin. They are sound enough to go .030 over for rebuild safely, giving the 4.500 and 4.530 bores respectively.
Still, I'd sonic check any big block before any boring took place, just for peace of mind.
Original question was on 454, answer is to sonic check the production 454 block, but unless it is one of the engines above, I don't think I'd even try it.
Now, ZL1 aluminum 427 blocks will handle lots more bore, with the proper sleeving, than most would consider prudent and safe, just have to use the right sleeves and machinist. Touchy, but worth it, and safe, if you make a good job of it.
[This message has been edited by IgnitionMan (edited 03-07-2000).]