ClassicCar

I am going to take my chances here and ask a question that no one has yet to tackle and answer.

Everyone knows that the 1940 Chevrolet was a one year only car. But, people also know that convertible models had reinforced frames but void of an X brace as with other cars of that era.

In 1940, they put under the Cabriolet (convertible) the craziest of chassis designs and wonder why? It was a one year, one car only chassis and made no sense by design, which was waaay overbuilt Kind of a H / KV / X design with a large square steel place on the under side only covering the various legs-brace junction.

GM had available to them any number of standard X brace designs and they even used it on the following 1941 model year Chevy Convertible.

So, was there a reason for this oddity? Was is experimental or some test? It is not mentioned in brochures nor shop manuals. Never shown in detail anywhere except for one shim chart I saw which was in a bulletin. Outside of that it remains a mystery and almost like they were hiding it's existence for some reason. :-/ :-?

Does anyone dare to answer this? If you need visual examples I can post. Thanks!

Jim