the fms kit comes with the shim kit. One thing you should purchase is a new pinion bearing, it does not come with the kit and it is already off, so soon replace it. Also make sure whoever replaces the gears uses friction modifier which is sold at every ford dealership. Depending on your daily driving i would get 3.55's if the car see's highways most of the time and 3.73's if you do mostly in town driving. by the way congradulations on the baby, hope all goes well. take it easy
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GT-40X(58cc)heads, cobra upper&lower, FMS 65mm TB, 75mm Bullet, 24# injectors, 190 lph fuel pump, moroso cold air intake, BBK 1 5/8 equal length headers, flowmaster cat back, 1.7 cobra rockers, crane 2031, T5Z gear box, centerforce dual friction, mcleod bullet proof bellhousing, 3.55 gears, hurst billet shifter with over 193,000 miles. thanks to all who contributed
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