Yes, the 200r4 tranny,I would think it would be a perfect choice for you also,, but their is a big price difference between a turbo 350w/converter & a 200R4w/converter.
Not sure if you want to spend that much money.
But, the 200R4 would be the way to go. Better gear spacing, power glide,gear spacing, uh,,no comment.
PG great if you have big engine big torque. But in your case,,,, the glide(PG), take it out.
200R4:
2.75 first,( .68 OD? )You can run 373's w/a 200R4 & still get decent gas milage & really wake up your 0-60 times.