It is probable that Benson will give a definitive reply, but tentatively: white cedar ribs, western red cedar planking, spruce inwales. At some point OT quit making 3 grades and put mahogany outwales on everything. Keel and stems most likely oak. And it's your boat so put curly maple decks on it if you like. RE: your photo - I assume you are referring to adding spruce inwale tip splices, as doing an entire inwale adds greatly to the difficulty. Add at least a couple temporary thwarts across the existing inwales to avoid the hull 'relaxing' while you work. Then get the canvas off, and carefully inspect the planking & look for cracks in ribs. Then you will know for sure what is ahead. TM...