length of 41 starting crank extension?

[Kube]

Originally Posted by ford38v8

If I'm not mistaken, the crank hole in the grille by that time was merely present to satisfy buyers who were still stuck in the Model T era, the crank not intended to actually be used, as major grille damage can occur by merely thinking about using a crank.

Alan, you are pretty much correct.
In 1940, the extension and mating crank were available only through the dealer. In other words, they were NOT part of the factory included tool kit.
Me? I can't imagine cranking one of these to start nor the need to.