So here is the drivetrain: 300 I6 (325hp/425 ft-lb. usable torque to 5,200RPM) T56 six speed trans. Now I need to figure out what rear end gears to go with. (I intend to use a Detriot Locker differential) Im just nost sure what rear end gearing to go with. 3.80? or 3.55? The car had a stock 2.83 (!!!) gearing and a c4 for its little 200 six.