boring my 318

I told him to get the books. These are easy questions answered in the books. But since the unasked question is the biggest mistake.......

As you see, a cut down (On the mains) 360 crank will increase your displacement some. IMO, it would be easier and cost effective to do a 360 block instead.
A 318 stroked with the 360 crank or a 4 inch crank will require expensive pistons. This is a "You wanna do it" project.

The cranks do not increase compresion because the need for a custom piston. The piston needs to be speced out.

You'll need to balance the crank with pistons when you get a stock crank or stroker. Not doing this is bad.