A simple swap, except the steering wheel will be wrong and obviously a '30-31 flat design instead of the dished '28-29 style. You could order a '28 red steering wheel made aftermarket for the two-tooth, which is keyed like your '30-31 wheel. Do not order the splined red steering wheel! Then the steering column swap wouldn't be so obvious. But you will have a problem with the light switch because there were four or five lengths in the '30-31 column, only one of which fits the '29 two-tooth, which is what you want to match. The length of the '29 two-tooth rod would be a perfect fit if it's the same length as your '31-31 rod. Any of the others will be either too long or too short. I don't have the lengths in front of me, but they are shown in most dealers' catalogs. Look at the light switch rod length for the '29 two-tooth in the catalog and measure yours to see if they match. If not, you'll have to do some modifying.
Also, the quadrant "ears" will never look right. The '29 two-tooth ears stick out and are more massive and antiquey-looking than the much more subtle '30-31 column. That's no biggie, but be prepared for lots of comments from Sidewalk Commandos who maybe once saw a Model A drive by.
Marshall.