A833 no shift

Swingn’71 said
As said ,sounds clutch/linkage related. Try to take pretty much all the free play out. Just to test and see if that little extra disengagement helps. Possible pilot dragging (spinning) input shaft. Maybe too tight pilot bushing..?? Shaft not slowing down enough to shift..?? ATF can’t hurt either, not likely the problem but should help for sure..Good luck..Swingn’

The linkage is good. Adjusted with very little free play. As I said in post 4, modified pedal to 6" dimension.
After several thousand miles with 3 speed, original Z-bar had fatigued and cracked where the lower lever arm was welded to it. The round tubing actually cracked and the arm had rotated resulting in even less rotation. Dan Brewer said it's a known problem with the earlier Z-bars so I bought a reconditioned one from him. Using the heavier 10" clutch exacerbated the problem.

I replaced the pilot bushing when I went to the 4 speed . IIRC, the uninstalled bronze bushing measured .754. After pressing it in, it very well could be down to .752. Pretty tight in my opinion. The FSM says to use the factory tool when installing and that it will properly size the ID. But I could find no reference to what the final dimension should be. It very well could be that the input shaft is spinning and not coming to rest. I tried to find some kind of reamer but had no luck.