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Id also like to make comment on thoughts about some other forums topics about the idea of flipping the studs around the other way.
Broken exhaust manifold stud question - Land Rover Forums - Land Rover Enthusiast Forum
Exhaust Manifold Stud and why LR did this? | LandyZone - Land Rover Forum
Its an interesting idea, but one thing that might be a problem is that by having more stud in the head, its more to get stuck/seize and have trouble getting out in the future....
I flipped mine around so there was more stud in the head - but did not tighten in the head fully - simply adjusted so that when fitted the ends of the studs were flush with the outer face of the nut on the manifold. No problems in 6000 km so far 😊
Yeah that is the other thing you cant screw it all the way in to the bit with no thread, but i was very tempted to do it :)
Another thing on the topic is i did try searching for discussion on if there should be a torque or high tight to put the stud in. I thought i found some people say same as the nut, but i think this is flawed and i never was able to get it that high nor wanted to try 100%, as the only thing creating resistance for torque is the wider non threaded bit of the stud, and this pushing against the head threads is not going to have the same holding power as all the threads in the head so you are likely, and i think i did a bit, wind it in too far flattening the starting threads. I ended up just dong it hand firm such that the non threaded bit was half in the hole.
Another tip I just remembered, when moving the air conditioning compressor, you want to remove the turbo wastegate solenoid valve, as the little plastic barb on top will easily get snapped of by being bumped as it sticks up right in the way.