Ford racing 3.73 final drive 3.73 ford racing gear swap
I did this mod before installing the supercharger . It wakes the car up when its stock and its on a few lines of blow when its procharged with this ratio .if your tires arent sticky summers it likes to go slideways . Stick with 3.55 if you want to be able to use first in normal conditions . 1st gets you off the line with 3.73/ real quick with good tires though .