Sorry 19Fordy, but I found very little useful information in the link provided! However, there have been good threads on this issue on the HAMB in the past. I prefer the ball similar to a front setup and the photos I posted above is similar to one I am currently building for a 33 with a quickchange.
Here are some that might provide some food for thought:
https://www.jalopyjournal.com/forum/...#post-11939809
https://www.jalopyjournal.com/forum/...#post-12142357
https://www.jalopyjournal.com/forum/...#post-11898050
"The OEM radius rods are not strong enough to sustain the torque once the OEM torque tube is gone. Radius rods were not designed to endure torque. They will crack and break."
I disagree with this comment and by the way, apparently so does Hot Rod Works, as there approach uses the OEM radius rods. Think things are getting confused here about the lack of an additional upper torque arm. Some type of additional upper torque arm has to be added.
1935-1940 Ford Radius Rod Mount Kit
$110.00
1935-1940 Ford Torque Arm kit
$145.00