[Wayne 962]

If you're moving your heads out by a half a milimeter, then your compression ration and deck height will change. In this case, I would look at stretching the rod to make up for the head gasket.

Where did you get the info to add this gasket to the top?

On your second question, CIS profiles are very mild, and typically don't even come close to the pistons, so you're probably okay. Especially if you are adding that gasket in there without doing anything else, then you are giving yourself a lot more clearance.

-Wayne