What was the rear gear ratio for the overdrive Clippers versus what was standard for the Twin-Ultramatic?

One big advantage for overdrive is using a lower rear gear for acceleration and having a higher gear for cruising. It makes all the difference in the world in the performance. The '56 Golden Hawk with overdrive had a 3.90 rear gear and 2.81 in overdrive. The T-U cars got a 3.07 rear gear.