I have a 97 GT 5speed. The stock 2.73s are noisy / whining. I have a little over 55,500 miles on the car. I'm thinking of going to 3.73s and was wondering how that will effect my top end? Right now with the 2.73s I have pushed 150mph (NO SH$T). I'm stationed here in Germany with the U.S.ARMY...