Never heard of a 1940 1/2 chassis.
Just to clarify:
My statement "Never heard of a 1940 1/2 chassis." was not meant to criticize anyone's " English language or spelling skills. I realized "chases" was simply a typo and interpreted "chases" to mean chassis. With that assumption, it me wonder if Ford had made a chassis design change halfway through the 1940 model year of which I was unaware.