Howdy. I am thinking about purchasing a 1984 b5200. It has some blowby, and will probably need rebuilding in the future. I am trying to figure out the cost of an engine rebuild, but I can't find any sleeves. Do the cylinder sleeves come out of these engines or will it just need piston rings most likely? I'm looking for a project tractor and I think this tractor might be a good one. Thanks!