Also see this thread for pics and tips.
Threading back 3-Speed Threaded Shift Rod for 1970 FJ40 - https://forum.ih8mud.com/threads/threading-back-3-speed-threaded-shift-rod-for-1970-fj40.1289573/#post-14552656
Steering column & shaft for Toyota Land Cruiser FJ40 - Genuine parts -...
No it's not split, but you can cut one. I removed the steering wheel and blinker stock, then slid it down the steering column. Pretty easy but tight tolerances.
Toyota # 55122-60011 (steering column hole shield), and replace the #90480-45092 (steering clamp grommet)