I did not know that about the big pin. Pin size is a problem when trying to find off the shelf pistons.

There is nothing wrong with good used pistons. These long pistons tended to wear on the skirts and knurling was used to improve the fit. Old techniques work on old engines.

If you order custom pistons you will likely reduce the rotating weight a lOT.

"I wonder if God created man because he was disappointed in the monkey?" Mark Twain