Specialty tools needed for A904 rebuild (and a good book)?

Yes that book and this one:

http://www.amazon.com/Torqueflite-727-Transmission-Handbook-HP1399/sim/1557883998/2

Also if you have a plug-in or other software to download streaming videos, you can download the 20 or so videos here on youtube:

[ame="http://www.youtube.com/watch?v=xzJhCBZ1wMY"]Rebuilding 727 torqueflite 600hp part1 - YouTube[/ame]


And do some Google searches. There is a LOT of good info on the web