Not sure if you want to be power shifting a car with your kind of power anyway. Why risk it for a street race. Miss the gear, potentially blow up your engine or worse, lose control of the car at high speed.
I shifted pretty slow when I raced the multi-Busas last year. I had a little more power than what you are showing, but a lot more weight due to the body kit (3,850 pounds without me in the car.) I also raced a stock Busa and yours had a few mods on it, so you did well.
You got some nuts racing at those speeds in traffic, though. Out here in cali, too damn many helicopters flying around that would see that, and we'd be on the local news channel - HA!