My point is that you have no idea unless you at least measure it.
If he ends up with actual 59cc chambers, runs the KB167's and ends up at .010" down and uses a .026" gasket he could be at 10.2:1. Even with a .039" he could be at 9.8:1 with those specs. But without measuring the decks or the chambers he could just as easily end up at 9:1. Or even 9:1 on the left bank and 9.5:1 on the right, a .010" difference would be all it takes. And that's where it gets tricky, because if you calculate it for 9.5:1 and end up with one bank at 9.5:1 and the other at 10:1 because the decks aren't square with a mild cam it won't run on pump gas anymore.
