440 Automatic. What gears are you running?

So if all you're going to be highway driving is 30 miles each way, i would go to a 3.73 gear. The car will burn the tires hard and still be under 3000 rpm at 60-65 mph. But it's your car decide what you're doing with it. I love the 3.73 gears in mine, perfect for my combo.