a few people here in oz are doing a dual case set up. only they are doing it in LWB zooks wheres theres heaps of room to keep going back.
i have a swb, and doubt it will be an easy task to get twin transfers under. wild weasel has done this, but extended wheel base and solid axles, what more could you want.
i'm also not too keen on the intermediate shaft, like in a normal sammy set up with a divorced transfer. i would much rather have a kicker set up, where the transfers and gear box are all bolted together solid.
anyway, thanks for the info guys.