i want to do gears in my car but i cannot decide wheather or not i want to do 3.73's ro 3.90's, is there really mch difference between the two of them? i know i definently do not want the 4.10's. also i really wanted to go with the ford racing gears because i have heard good things about them but i dont think they make the 3.90's. any ideas would be helpful
thanks

 

if your considering 390s...just get 410s. they are great

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FWIW use search this is a topid that has been discussed the world over