The problem there is that starting with the F1 series, the steering shaft is splined instead of a tapered shaft with woodruff key. The Lincolns & Mercury cars were the only ones after 49 that still had a tapered/keyed shaft.
Splined shafts in started in '49 on the passenger cars and started in '48 on the pickups. Not sure why your 49 would have a keyed shaft, but with Ford anything is possible.
Rotorwrench is correct, I apologize for the incorrect info. I pulled the wheel from my truck a few minutes ago and it is splined. I was positive that it was keyed, oh well I guess the memory is not what it used to be .
Mark