Gear Ratio
http://www.summitracing.com/parts/sum-741001/overview/
The part you have linked is not correct for your car.
looked at your 'about me' profile,you have a 98 Z28 Automatic. You(we) would need to know if your current rearend gear is 2.73(GU2) or 3.23(GU5). That would determine what gearset you need,for a 2 series carrier or for a 3 series carrier.





