Well, it only took me 4 years to get this project done. Today, I finally made a parking brake latch. I built it similar to the old Farmall setup with a ratchet plate and a catch on the pedal. The Farmalls had the notches on the pedal and a spring loaded catch hooked to a handle to set the brake. Stomp on the pedal and the catch releases. Now I no longer have to shut off the tractor in gear to keep it from rolling downhill.
