The photo states the '39 dimensions are in the 'circles', where as the '40 measurements are depicted in 'squares'? Looks to me like there's a corresponding '39 measurement (circle) for every '40 (square) measurement. Maybe I'm missing something, but I believe what you're asking for is at your fingertips.
Almost, the pic is of a Plymouth unfortunately. I can find heaps of other makes and models but not the standard 4 door sedan
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You've got your work cut out for you, are you missing the entire interior? The Early Ford V8 foundation has a book that covers your year, not sure if it has an interior diagram.