first time to the track with new combo (video inside)

Personally I think your doing fairly good considering your carb is only a 650. I'd be thinking of a 750 or better - give it some top end.
What pressure are you running in the tires - lower it if you can, I haven't used the 555 Nitto before but with my NT01's (curcuit tire), the one time I went to the drags I ran 13psi and was happy with the result.