There was a trend for years to reverse the piston in stockers then that has gone away to some extent. Partly because of sleeving, offset boring, and slant boring, etc.
With the rod angle we've got in the stock class dictated by the stock length rod and pin height, you're going to get piston scuffing on the thrust side regardless of the tiny amount of offset in the wrist pin boss. Builders today don't seem as concerned with the direction -- maybe they just don't care as much about the flathead as they used to.