boring my 318

Knifeing the crank at this level is not really worth the effort at this level of performance.

When you order the pistons and spec a 9.0-1 ratio, the main question you'll need to answer and know is how many cc's the head has. This way they'll know what piston to give you.
You'll want the ratio to be between 9.0-1 and 9.5-1 for iron heads. (Plus 1 point for aluminum heads.)