I just put 4:10s in my car and as everyone has said DO IT! The 4:10 unfortunately make my tires spin like crazy, but hopefully drag radials will do the trick. With an auto and 3:73 it shouldn't be a problem. The only problem i had was the coller at the end of the drive shaft needed to be tightened after an initial run. The bolt holding it in place is already tight but I was hearing some rattling. After really crushing the collar the noise went away. Watch how fast you go through the gears!