If you are going with factory style steering box, up grade to a 41-46. You will need to do a little custom work to the steering wheel shaft if you want the '37 horn and steering wheel. The box will bolt in as is, the shaft will need the '41 -'46 wheel on it. Internally, the gear box uses ball bearings, and a slow gear ratio, so they steer much easier at slower speed. The '37 box is gear to gear.
You can also adapt the '46 leaf springs up front for a softer ride.