Here's a site that has the CharLynn torque generator. They used to have a photo of an installation on an AC WD45 but I don't see it there anymore.
The torque generator is also available at Surplus Center, Item No. 9-1848 for the 700 in-lb unit. They are at 800-488-3407.
I got one from Surplus Center last summer and installed it on my Oliver 77. It works great...I wish I had done it years ago.
You will have to fabricate a mounting plate to support the unit somewhere in the steering shafting before the gearbox. You can get detailed dimensional info on the unit at the Eaton Corp. web site.