We had an 830 dual range diesel about that year model. Ours was what Case called a Standard 4 Wheel model, not a Western with the big fenders and ours had eagle hitch but non adjustable wheels or front axels. I am guessing not many of those made as I haven't seen another like it.
It ended up somewhere in Central Texas around the La Grange,Brenham,Schulenberg,Giddings area. Would like to find it again but it may have gone to scrappers by now. Was a real puller.