Just bought a 2004 Gen 3 Mamba - Put HF cats and Corsa Track exhaust. I don't like the stock 3.07 gears and want to change. Most of the gearing I read about is confusing because of all the different mods done to your cars. Does anyone have a basic stock Gen 3 with a gear change? If so which gears and why ? Car is for street use only but looking for some fun factor off the line. Thank you in advance. Short shifter and tune to follow.