Finally got the tractor at home going again today. Good to hear her running again. New big end bearings, head gasket, engine totally cleaned out internally and decoked, and a new exhaust.
Only slight issue was the repair job I did to the block to repair the leak in the water jacket failed to stop the leak. But, it's just a small weep now, not a gusher that I had before.
Pics later once the camera recharges.