Mines the Diesel, if memory serves (check the workshop manuals) the Diesel Clutch is larger than the Petrol Clutch.
What went? It slipped. Cue buying a clutch kit which includes friction plate, cover, and release bearing.
I'm pretty sure each componant is available seperately, but it's a case of how often do you like to remove the gearbox and TC.
50k is a reasonable estimate, the original was longer, but I put up with it slipping when on maximum torque. Subsequently I realised it's just putting off the inevitable, and what's the point in driving a crippled vehicle, so when I detect slip, the clutch is changed.
I thought, and still think, that 50k is too low, but others point to the vehicle weight and say it isn't so bad. I'm not convinced, but neither am I so convinced that I've looked seriously for an alternative to the standard. Again, I've had conflicting advice, but haven't met anyone who has used a paddle clutch in a 2.5 ton car on tarmac and in traffic (ie no wheelspin).
Now I've got the new slave cylinder, and realised how bad the old one was, I'm interested to find out if clutch life is extended. Come back in 30 to 36 months. I'm convinced that with the old slave cylinder the clutch wasn't being released at the same rate I released the pedal, thus the clutch was slipping slightly more than I thought on every change. The effect, if not the cause, was particularly noticable when starting from rest.
I've yet to try the difference in low ratio.
If I'm expected to comment on your choice of box and TC, I can't, as I have no experience of any Land Rover but my own.
Cheers, and good luck.