What gears you running ? With 28 tire and 2.76 or 3.23 it will be a dog in the city , good on the highway though . You do mostly city or highway ?
Calculator for tire size RPM speed http://www.bigblockdart.com/forum/speedtire.php
Im running 3:73, trying to get my RPMs down do help with the gas milage. Hence why Im looking to go to a taller tire. My car only comes out on weekends, and its a mix of city and hwy.