Steve is correct about losing acceleration in the top gears with the 3:27s. However I have enough power to pull very strong all the way through 4th. What killed me was I chose the wrong trans. overdrive split which effectively made my 3:27s 2:10s in 5th gear. And at about 3300 in 5th which is 115 I can't push through that huge wall of air. Aerdynamics, What areodynamics ? These cars are as aerodynamic as a brick.
Ron