Quote:

I was talking with a local big time racer(a Mopar guy) and he told me I need to keep an eye on my cylinder bore. He said that it use to be with the KB blocks, that when you had a 4.500 bore, they had a hard time keeping them round if you were putting any kind of good HP to them. He wasn't sure if they got that problem figured out yet.
Has anyone heard the same thing? Has it been fixed yet? Or has anyone had that problem?



That depends on the OD of the sleeve, and it could be a problem with any aluminum block, not just KB. If you have a KB block, find the number on the oil pump mounting surface and call them. They can tell you everything about it.