Contact these guys, they'll give you all the info you need to do this.
Ashcroft Transmissions
It's not going to be cheap, but it will be worthwhile, better than any fairylander sold in USA, certainly. Make sure it's auto, much better than the manual, on or off road.
Don't even think about aftermarket aircleaners, the genuine LR ones are better. Except for the Series oil bath types, which should all be collected and inserted into the genius who designed them
