i would go with the auburn and 31 apline axles and c-clip eliminators and if it's a five speed 3.73's and if it's an auto 4.10's 3.27's are pretty much a waste of money and 3.55's are close to a 3.73 but not quite after building over 25 stangs these are just the basic guidlines i have found to work best i am thinking of trying the new 3.90 gears in a five speed car to see how streetable they are i think 4.10's and a five speed aren't very streetable but 4.10's in an automatic car are great and still perfectly streetable because of the different gear ratios of the trans.
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