[BRENT in 10-uh-C]

Since no one responded I will add some thoughts. I have two FM wheels, and both of them have just enough "play" to make them unnerving on my Ts. On a Model-A, I'm not so sure how most drivers would view that amount of 'slop' in the steering.

If you are still wanting to modify one, I would start with a metal slug and either broach it or bore a taper depending on the steering shaft type. Then bore the steering wheel to interference-fit the slug into the steering wheel using some Loctite Bearing Mount to glue it in, and then drill on the perimeter of the slug (50% of the drilled hole into the slug and 50% of the drill into the steering wheel) and insert 2 or 3 small roll pins to act as a sprag.