hey so i got a set of radius rods from a friend and there are SUPER heavy duty.... my guess is that they are off some kind of truck.......if you have a set a rears let me know......
here is a photo of the front of my Fordson. If those are from a tractor as I suspect you will be a long time finding any for the rear!
Possible they may be off a tractor other than Ford. I've got one off a 9N Ford (which has an I-beam cross section) and it doesn't match that or the ones that are on my 8N. Heavy truck maybe? Frank