I do some highway driving here and there, but i dont really have enough open roads to worry about having top speed, so i need more acceleration, light to light stuff, so i was thinking about 4.10 but i didnt know if it hurt the engine or if the mpg dropped compared to 373 and 390. also i would be doing it myself, prob just change whole rear end since ive never changed just gears. one more thing, it would be with a stick, unless there is and advantage to having auto. any help would be greaty appreciated since i cant find much info on web. thx!!!!