Just in case someone has the same problem, I ended up using the original LT77 push rod on the advice of Ashcrofts, and all seems to work from a static test.
The ftc3912 option was about another 20mm longer and waaaaaaaaaaaaaaaay too long.
The...
Sorry, I skim read and thought the clutch had been changed.
If nothing's obvious when you look underneath, jack up one side, spin wheels in neutral to get the the propshafts and transfer box, handbrake drum etc all turning. Filing that, jack it...