I can't say for a 1940. I just replaced my '49 truck steering wheel with a 1952 Chevrolet car steering wheel and it works great. Pay particular attention as to the plastic hub of the '53 wheel, it pries off gently. Note the screws holding the horn ring and the contact pieces underneath, they have to be assembled in order so take picture notes. Disconnect battery or you might get intermittent horn sounds.
~ Cosmo
1949 Chevy Half Ton
Rocinante, like Don Quixote, he is awkward, past his prime, and engaged in a task beyond his capacities.
"...my good horse Rocinante, mine eternal and inseparable companion in all my journeys and courses." ...Don Quixote, Cervantes
"If you come to a fork in the road, take it."...Yogi Berra
"Rudeness is the weak man's imitation of strength." ...Eric Hoffer
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