transfer cases are problematic mainly leaks and joints. If you are looking for one, look for a US model which came with 5spd and 2door coupe... canadian versions only came with auto and 4 doors. Rim offsets are unique with the ix, they have 40+ offset whereas standard e30 (except m3) came with +20 offset, someone correct me if im wrong. I believe the suspension is also unique for the ix as well.
'You don't buy all that jewellery and stick it on an ugly person.'