This kit? http://www.parts123.com/parts123/yb.dll?parta~partsort~1~cadffffa How did you like it? If not any others?
My trans guy builds and wires my 700R4s with one 12v wire keyed on and they work flawlessly. Shifts to 4th around 55mph and converter locks a few seconds later. He's done a 1/2 dozen without any issues.
That's all you really need . Personally , I would add a toggle switch to the feed wire. Phoenix major crossroads are laid out in mile square blocks. I figure you really don't need 4th gear plus lock-up every mile. When I'd hit the freeway , I'd just flip the switch on.