What to do to get a quicker launch...

If you can find a 8.75" with the removable carrier it would be a lot easier to go from gear to gear than the 8.25". If you value cruising the highway at high speeds and enjoying moderate gas mileage then the 3.91 gear is not for you. If you want to go from street light to street light as quickly as possible then you`ll get your moneys worth from the 3.91.