Thanks for the post. I knew about the sealed beam headlights and the dash layout. How about the axles and hubs?

It looks like the frames have the same dimensions, but there is not a lot of information about '40s on the old Chevy Manuals online project website - many of the pages were missing or damaged when scanned in.
http://chevy.oldcarmanualproject.com/chevyresto/40index.htm

Any other big items that changed?

thanks,
Doug