[olddog]

So what is the criteria to judge by? So if I bore and stroke a 390 block to 428 CID and I disclose that fact, what more can I do. It is the standard 428 bore and stroke. Do you expect it to be advertised as a 390?

If so then I can take a 390 block and drop a 352 crank in it. I believe that is the 360. So I can then advertise this as a 390, since it started life as a 390. Now I would call that dishonest.

To me the only question is how much meat is left in the thinnest part of the thinnest cylinder. There are many 390 blocks that were not cast thick enough to bore that far. Then of the ones that were cast thick enough there can be core shifts that leave one side too thin on one cylinder. My concern would be how well was this tested and verified.