What torqueflight 727 transmission rebuild kit do I need????

I do plan on doing the rebuild. I'll try to find a rebuild book as the one suggested does look helpful. I've been doing a couple hours every night of research and planning for this build so I hope for it to go smoothly. I have completely disassembled the tranny and I'm now looking to buy a overhaul kit, sprag, solid band, strut, gear band lever, shift kit, and billet low/reverse piston(possibly). I'll buy some assembly lube as well. The torque converter I'll get from a friend.

After reading some more on sprags I decided to go with a 4 bolt 12 roller sprag because its cheaper and I don't have to drill more holes. I read on some other threads that the factory sprags work fine and only fail under operator error.

And or drive train failure! Always replace the spag after a shaft or similar drive train failure.