Andrew, I remember reading something about dating Wisconsin engines.
I am pleased you asked about the outstanding jobs on the Bolens, it made stand back and reflect. I want to get to the point when I can try to fire it up to see if an engine rebuild is required. Before I can try to fire it up I need to remove the PTO and the bracket that is attached to the rear axle, so I can replace the engine and axle oil. I then need to rebuild the carb, free up the throttle cable, repair the hood and buzz out some odd wires. I also need to free up the freewheeling pin on the back axle.
No progress tonight because it was parents evening at the kids school.
I am impressed by the amount of wear on the front spindles and front axle, it is worse than any of my other tractors. A full rebuild is required on the front end. The bronze bush on the non diff lock side of the rear axle is toast too, but not unexpected given the wear on the front.