throttle body is slightly differefnt, but both r interchangeable (have to use either full 2wd fuel rail and TB or full 4x4 one)

thermostat housing is different. need 2wd one.

sump is diff. use 2wd one. Also need 2wd oil pump and pickup pipe. 4x4 one is in a slightly different position.

Use 2wd TPS...both throttle bodies are the same tho.

oh, and to use the 4x4 oil modine u need to undo the big bolt (24mm i think) and move the filter up so u can bolt on the 2wd engine mount.

buy a sump gasket set for a 2wd and prep it for as best u can (take ur time and do it properly else it will piss oil)
The best tip is to turn the engine upside down while preparing the sump surface etc....

i done the same job not too long ago, and thats the main points.