Here is a receipt from an old shop that was located in Torrance. After my father rode his Shadow for a few years, it seized up, and when he took off the top end and barrels, the rods were a little loose, so he split the crankcases, and took the flywheel assembly to Schumacher to have it serviced. They installed an Alpha big end, and put the crank back together.
Very cool Steve! :Less than 20 bucks for a crank repair. Long ago…