Back when I was young and dumb I had a '69 383 4spd RoadRunner. One nite I trashed the 3.55's and all I had laying around was a set of 2.76's so in they went. With the tall 15" tires I was running it would do 105mph in second gear at the shift point. Even with some engine upgrades it didn't have enough power to get even half way through 4th gear. I'm lucky to be alive today after all the high speed runs I made in that car. Dave