what rear gear to choose for road racing

A detroit locker or true track (torsen gleason) are the best.

Really? I'm not trying to argue.....Lord knows you got the experience here, but would you expound on this? My stupid brain tells me a locker would try to push through turns. What would make it better for road racing? I know all the dirt boys down here use open diffs. That might not be a good comparison, though. Learn me sumffin. lol