Ballpark Gear Ratio

Stocker runs 9.0R x 30 short 92.5 rollout
Super Stocker runs 10.5R x 30 when we want to go fast / 13 x 31 Bias usually

Stockers Mid 10's
SS High 9's
When we want then to.
All Thermoquad 340s
Anything special done to thermoquad for running in the 10's?