10-20 engine freed, piston/sleeve question

If one of those connecting rods is turned downward where you can remove the cap I would try tapping it out with a piece of wood to see if it moves any. Those rods have shims and you should be careful to remove these and reinstall on the rod after you get the piston out. Those rod caps should be numbered and should face the camshaft side of the engine.

These rods have dippers too since the engines back then didn't have oil pumps. Your sleeve may come out with piston, so do not get worried. If it does you can heat those sleeves with a torch, so you canremove the piston. You are probably going to use the old rods. Are you going to pull the engine? That crankshaft is probably egg-shaped due to the oil system they used back then.

It probably will need machining too.
Federal Mogul at one time would rebabbit your old rods like new. They needed the dimensions of the rod journals too. I had the redo some rods off a garden tractor known as the Standard Twin and Viking Twin. I restored 6 of these. These tractors were away ahead of their time since they were all gear driven and had a pto. I still have a moldboard plow off one of them that I adapted to my garden tractor. I've had that plow since 1960. I changed the point once. Hal