rota-70

Hey guys, I'm relatively new to the Rolla's after helping a friend with his KE30 some years ago that we fitted a 2T-G and eventually 3T-GTE into with microtech and such I haven't had much to do with them. I've now got myself a KE70 Panelvan with a 12A-Turbo (I'm a rotorhead anyway) and I need to fit another diff as the last one was supposedly locked but wasn't done properly. I'm wanting to just replace it with an open center but wasn't sure if the Panelvan has a different center to the sedan. if someone can please shed some light on the issue that would be great. Matty