I have a bud that just did a brake conversion on his A. He is fishing on the coast this week so I can't ask him. But if i remember when he is back next week i'll pick hi brain for you.
Getting back to the wooden parts. Did you know that Henry Ford got parts from other suppliers in wooden crates Ford designed? He did this for all those wooden parts you are talking about. The crates are you floor board.

I didn't do it, no one saw me do it, you can't prove anything! "Bart Simpson"