I would get a Nelson tune if you do not have one yet. You will not regret it. With wheels that tall I would look at getting some gears and a good posi. I have 20s went to 4.10s and love them. Cruise on the highway around 2-21k around 70. In town I get around 16 mpg depending how heavy my right foot is. Exhaust, intake, upgrade tranny, the list is endless man. It is all a matter of how deep your pockets are LOL Speed costs money how fast do you want to go.