You can have the wrist pin located behind the rings, except top ring, to keep rod length. One method, if you only move behind the oil ring, is a simple bridge. To position behind the oil ring and number 2 ring requires a tight fitting aluminum insert (with lands), using a shorter wrist pin. Number 2 ring is a busy guy, moving and blocking heat, it needs to be able to do its job.
Your piston maker can also squeeze the compression ring a little higher on the piston, but it shortens the life, and has very little strength during detonation. I still have one out of my first drag bike, that has nearly all the pieces of that high-mount top ring, neatly embedded in the dome in a pretty starburst pattern....like a flower, lovely!
Keep all the rod length you possibly can.
JimL