It's time to rebuild my TF727 and I'm looking for the best way to build it. The CJ7 has a 360 howell efi, TF727, D300 & 37MTR's. I DD it once a week and trail ride it about eight times a year. What torque convertor should I be looking for? I want it to shift smooth. I drove one with some type of shift kit and it shifted hard.