Rear end gear question? 3:23's OK

salinasjoel said
experience with a 400hp 360... went from 3.91 to 2.94 rear, the 2.94 is way friendlier for cruising but it was significantly more fun with the 3.91... I will likely settle in at 3.23

...what car and tire size...i'm running stockish 25.5" tire in a Dart
which are very easy to break loose with a stock 340.