[SCadaddle]

If you are going to create a tool to get the wrist pins out of the pistons/rods, let me suggest using a piece of threaded rod with the correct sized socket tool that will fit the end diameter of the wrist pin, a washer and nut on the threaded rod behind that, and at the other end of the threaded rod something that will fit over the threaded rod and has mass, such as a piece of pipe, followed by a washer and a nut.

What you are making is a slide hammer. You can hold the piston in one hand and repeatedly slide the mass against the washer/nut on the other end with your other hand. Worked like a champ for me!