These are still on my old web page. The Getrag info needs to be updated. One day when I have time I will do that.
www.rodneydickman.com/getraginfo.htm (Getrag info)
NOTE: Many if not all of the parts listed from GM are probably no longer available.
www.rodneydickman.com/n36.html (split the case)
Here is a write up on splitting the case with pictures: