Well, you have to take into consideration that this isn't a racecar and it will be female driven and if she isn't 100% badass chick who loves racing. Then she will not enjoy anything over 3.73 because of the noise and gas mileage. Or I would have to say 4.10s MINIMUM

The reason us wimpy 5.0 owners stick with the 3.73s and generally nothing above 4.10s for a street car is because we make enough low end power to pull the car with 2.73s