Lots of stuff on the HAMB about HRW pieces and converting your '40 to open drive. I'm using '35 bells, '37-'41 axles and the center from a '46 truck and it's going in a '28 Tudor. Not to get too hot rod for the barn, but I'll find some links.
Just a few I have bookmarked.
Rear radius rod posts:
http://www.jalopyjournal.com/forum/s...d.php?t=589044
http://www.jalopyjournal.com/forum/s...d.php?t=533765
DIY Open drive conversion:
http://www.jalopyjournal.com/forum/s...d.php?t=519343
http://www.jalopyjournal.com/forum/s...d.php?t=324073