Use the 5 roller planetary gears. In addition: 13 vane pump, boost valve, shift correction kit, Vette servo and external oil cooler. Now if want to something to hold down power add: super servo kit, extra strong clutches, heat treat out put/input shafts and torque drive kit. The torque drive kit includes a sun shell to take massive torque output.
For parts checkout:
www.bulkpart.com and
http://www.transmissioncenter.net/700MegaRaptor.htm
I have all the upgraded parts listed in my 700R4. Shifts like crazy. If you want smooth shifts, you better have your foot all way into the throttle!! I'm not kidding!!