Appreciate the input. They sell kits that contain: Pistons, Rings, Sleeves, Rod Bearings, Main Bearing Set, Head Gasket Set, Oil Pan Gasket.
When I did my Farmall M, I did not install the Main bearings, because I did an in-frame rebuild. Did all else though. Can you in-frame install the Main Bearings? If not, is there any harm done in skipping that.