Thanks Tom, but really, if the block and pistons are stock, there is a minimum cc that the head can have in order to be on the 9.6:1 max ratio.

Come on Tom, you build motors. You've had to cc the head chamber of a 9.6:1 compression head. What is that cc? Unless you also deck the block in which case you would take less off the head with more cc in the chamber.

Either way, care to share any details?