LOL @496. The top end diff. would be small IMO. 10 HP. It's not a whole-lotta engine. I see a whole lotta stall converter with a small cam and some decent gear on a tall-ish tire. I bet that launch's preety good.
The best thing about a DP is your in control. You can use and get away with a 750 if your foot control is good and you can feel or know where the secondaries are opening and if it is a good time to do so.
Once your running down the track, it's just a wide open freeennzy at that point.