Pushing front to back when over wrist pin. Piston to wall clearance was .0028-.0030. I matched the pistons as best I could to the bores as bores came in 4.0755-4.0760. I outlined in post #62 for a bit more on that part of the build. I have a short video you can see the piston moving - trying to post it.im surprised you have that much swing between no rocking and rocking while over the wrist pin. are you rocking top and bottom while the indicator is over the wrist pin or pushing the piston front to back while the indicator is over the wrist pin?
what is your piston to cylinder wall clearance?