Need help tuning Supra rz ‘97

[Brohub1]

I got a Supra that I’ve been trying to tune for drag but my gear ratios are wack and I can’t get any traction. The highest gear I can launch in without spinning out is 4th but then the cat just lugs. I’ve played around with with the final gear too and tried Changing LSD and tires but everything I do does nothing. Just need some drag tunes