Adjusting AC and Heater cables

[stope4]

I can't seem to get the cables adjusted correctly for my ac and heat controller. The bottom lever will only go about half way across the control face. The middle lever stops about an inch from the right. Does anyone have a good way to adjust these things where the levers use their full range of motion on the control face?

Is there a possibility that different year trucks had different ranges of motion. As an example, what if you put a 72 evaporator box in a 71 with a 71 controller? Or any mix and match combination.