After several hours over the past three weeks I'm making some headway.
Here are the shifting forks needed to shift from drag mode to walking mode. I needed to do this for quite some time. I just needed an excuse to tear down the machine.
Here they are fitted into the main machinery frame. I am still working on a method to fit a servo to make the shift. I also need to make a brake band to keep the drag drum from unwinding when the clutch is moved over to the walking clutch.