How to tell if a '40 was business or 5 window coupe

[V8 Bob]

There were at least two '40 5-window coupe rear trunk brace designs. My early build has short side braces to the top of the wheel wells, similar to the business coupe.


I'm 99% sure the main difference between the business and 5 window coupe floor pan is how they were assembled, with the placement of the "L" shaped full width step panel leading to the trunk. If mine was flipped, the cabin floor would be extended and trunk floor shortened, just like a business coupe. The spare tire support would obviously have to be moved back as well, and adding an additional vertical support would complete the transformation to a business coupe.