That's a good question and one I have no experience with. I would certainly thing they could easily go the .070 to the standard 440 bore to make a low deck 440. In fact, I'd do it and never look back. Now, if I was plannin on wantin to hit the 4.342 bore of the 400, I'd sonic test for sure. That's a .092" over bore. My guess is, it's safe to do it, but you'd want to be sure.
