With the wheels straight ahead the pitman arm should be in the middle of its travel as well as being at 90 degrees to the frame on the Model A. (Deuces will be slightly different due to the stock 2 degree frame kickup.)

Do your wheels steer equally sharp in both directions?
Or could you have different length stop nuts on the spindles?

Sounds to me like you need to re-orient the pitman arm on the steering boxes splined shaft and adjust the length of the draglink.
It's possible you may run out of adjustment length depending on which way you go.
Custome length draglinks and tie rods are available as well as being easy to make.

Make sure as well that you're not bottoming the steering box out on the internal stops.
That's what the spindle stop nuts are for.