The body wood in a roadster is fairly intuitive once you start trial fitting the pieces. They'll only go in one way, paying attention to the pre-drilled holes with their countersunk tops. Keep in mind why the wood is there in the first place: to act as an anchor for the interior panels that will be nailed against them. It is not structural wood. Look at your interior kit pieces (if you have an interior kit already) and you'll see how they match the shape of the wood pieces. The curved belt line wood will also only fit one way. Once you place the pieces on the metal lips, you'll see how they fit. You may have to sand portions that stick out too far, but generally the wood makers have this body style's wood patterns down pat. Not much extra work is required beyond some contour sanding. Just be glad you don't have a pre-slant windshield Fordor!
Marshall
late 1931 Deluxe Roadster