I like how anything with gears or higher stall is automatically a rock crawler and drag strip beast. It's called "every action has an equal or opposite reaction". Automotive 101. Taller tires will make the vehicle act as though it has a higher (numerically lower) gear ratio in it. To correct this, one must install lower (numerically higher) gears. Or live with it. The 4.8 is a high revving motor, why that design was built for a truck is beyond me, but that's not the point. The sooner you get it into it's powerband the better, or yes it will feel like a dog. Again, gears and a higher stalling torque converter.