Help with Torqueflite 904

The case is a little smaller so the pan and gasket, while close are a little smaller. The extension housing is different as I believe is the output shaft to fit the Mitsu slip yoke. The input shaft and reaction shaft may also be different but I'm not sure. I don't know if the valvebody can be interchanged or not. It's been a long time since I did any work on those so my memory is kind of scetchy.