What is your powerband? The proper gears are determined by your powerband. Your pretty much limited to 4.56's without having to shift to 5th, or running it out past 7000rpm.
I watched the video. Did you get a 1.62 60'? I would think you could get a better 60' than that with slicks. You should be in the low 1.5's. If you can't launch any harder than that, then you need to work on tuning the suspension so you can.
BTW, nice ride
I bet it took a ton of work to get to that powerlevel NA