you get a 2.9 4x4 v6 mt75 box and a standard rwd mt75 box

the front casing and input shaft from the 4wd box replaces the same on the rwd box

voila, hybrid box

edited to say that you will be looking at probably £300 all in to get teh box rebuilt like new, well, at least that what it used to cost me to remove, rebuild, refit and oil up my one