Need info on the threaded rod attached to the speed selector on an rj35

[JUSS10 250]

Finally got around to working on my rj35 a little. I made a selector lever for it today. Looking for some info on the threaded rod that attaches the speed selector to the veri-drive setup. I have a few sitting around from later tractors that I just plan to cut to size but it would be nice if someone could give me some info on one. Maybe even a picture with a tape measure next it. Any help would be greatly appreciated.

Thank!

Justin