For what it's worth, the starter pedal on my '51 screws on to a short shaft that screws on to the tab on the crossbar just like the pic posted by Rabaut. I would assume that there was a change back in the 40's from the crossbar with the welded on shaft.

Kevin
1951 Chevy 3100 work truck
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1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car)
Busting rust since the mid-60's
If you're smart enough to take it apart, you darn well better be smart enough to put it back together.