999 Lock-Up Transmission / change input shaft to non LU?

Okay so I'm contemplating doing this to my 998. I rebuilt it and it works great but we have a few 904 converters I would like to try. I have a v8 904 with a bad case I can rob parts from. I would need the drum, input shaft, pump out of the 904 correct? It would be nice to do this over the winter. I already have a full manual non lockup valve body in this transmission