The rear springs are from chassis engineering- they were really easy to install because I think you had to drill 2 holes for each side, but they already lined up with other holes. Yeah Eberhama- I did sell you that hood- still got it?
As far as the tranny goes, I got it from Conley Nygaard as a trade for a '52 F-1 cab and chassis, and he said it was a '39, but he can be kinda mixed up. If there is such thing as a later 3 spd. open-drive toplader, then that's what it might be too, but otherwise Dick DeMars said that you could use the open drive yolk from a later model tranny.