Stock Dana vs Powertrax Question

My 8 3/4 was an open rear from the factory. The powertrax really did hook up both tires equally as apposed to the Sure Grip which isn't quite as equal right off the line as the powertrax but for the street it's okay. If I was just going to drag race the car I would have left the powertrax unit in it, but my car is a street driven car and I like the quieter ride.