I have a stock rear end in my 1991 mustang 5.0 coup with a manual t5. I have 20inch rims and want more power to compensate for the weight. Would 355 gears be best or should I go with 373. Which ratio would give me the best all around power band.
On a fox body with the t5, the 3.73 gears are the most balanced for town and highway use. You will notice a nice improvement in performance while still being comfortable on the highway.