Brian & Roger,
I just read your posts and I had already removed the head. I had used a video camera on a snake that gave me a good look inside the cylinders and it needed to come off to clean up all the sludge the chemicals caused. I was able to determine that the cylinder walls above the pistons are in great shape so I’m hoping that they are in the same kind of shape below and it’s just the rings rusted. In any case I like the idea of removing the big ends and will attempt that tomorrow.
I keep you posted…..