this is the easiest way for you to do it considering you wish to convert it back later
2 wd gearbox, shit plate and 2 wd starter
2wd bell housing clutch fork and thrust bearing
2wd gear leaver
remove the front diff and cross shaft
strip the front drive shafts and refit the outer cv only
2wd front prop
you can leave the rear diff but be gentle
gear box cross member off an auto model
2wd speedo cable
thats the majority of it off the top of my head