hi I have got a 1988 90 with the 2.5 petrol engine (17h) block has hole in it. I also have a bmw m57 engine with only 30.000 miles on it I would like to put it in the defender but make it auto as I am doing it for my friend as a present. and they can only drive autos I am a little stuck on what I need for it i.e. what gear box I was told possibly a GA6H26Z. and can I use the Land Rover transfer box etc also about wiring how to put the ecu's etc and the keys/immobilize and the gauges i.e. speed fuel coolant etc thank you