You do have the clutch pedal?
You will need the rod from the clutch pedal to the 'Z' bar, the 'Z' bar, and brackets to mount the bar to engine and frame. Also the rod from the 'Z' bar to clutch fork. There are some difference in 'Z' bars, so I suspect that the 81 won't interchange to the 69. It would be worth a try if both trucks are non-op.
Larry