To get it surfaced it will first need to pass a hardness test, if it passes this it can be surfaced... Although land Rover say no, buy a new one.
It doesn't need anything removed to be hardness tested, but if it passes, it will need everything removed.
So .. probably pull everything either way.
If you replace the head, you will want those bits, if you surface they need to be pulled anyway.
Cheers
James
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