http://devestechnet.com/Images/Restorations/1950B/D50b01062lg.jpg

That is where the area in question is located. Two problems to be aware of, but not insurmountable. You have to remove a little bit of meat off of the bottom floor support and also you have to figure out how to share real estate with the trans cover since they are so close. Offered to give you an idea how that large of a cover would look and where it would be located.

http://devestechnet.com/Images/Restorations/1950B/D50b01001lg.jpg

Deve

1950 Chevy 3100 Deluxe Cab
1950 Chevy 3100 Standard Cab
In the Stovebolt Gallery
The Think Tank
More info and tips at Deve's Technet