Knobbie tire street racing

[FAST N FLASHY]

I have a few questions I race on the street knobbie tire(cheetah) 2 be exact- 1/8th mile.. I have a 72/7 supercub 7mil with LED OUTFRAMES, 268 STRAIGHT CUTTS, JJ&A AXLE, 40mm lectrons alkyd, billet basket, lighten 1-5 tyson, shorty shocks front, r6 rear shock - I can't seem 2 get 6.20s out of it... ANY SUGGESTIONS 

[trickedcarbine]

Knobbie rules, if not switch to an American Racer or Hoosier.