All XR wagons(ED/EF Only) have 3.45 LSD and someone prove me wrong, utes as well,though the ratio might be 3.7/9 not sure.
ill check it out.
A point to note EL outback utes had the hydratrack LSD if you can find one second hand,not sure of the ratio
yes the centre will fit you housing,wagons are leaf spring ,as opossed to coil,from EA on
Its just me in the Wagon