Very interested in the AW4 conversion
For the manual you need the engine & gearbox from a Toyota 4Runner 3.0 td this is the same box as the ax15 found in most 4.0 wranglers.You need to strip down both gearboxes swap the input shaft & bellhousing & that's about it.The uk 4Runners also use a mechanical injector pump but the surfs are all fly by wire pumps which is where the auto gets a lot more complicated.