has anyone tried a 3:08 gear ratio for the street. I currently have a 79 Z28 with the 3:42 open gears, automatic transmission. I am kinda wanting to get more of an interstate gear and lower rpm at cruise speed say 75 mph. It seems like the trans am had a 3:08. just looking for feed back please. Of course I will keep the factory gears in case I sell the car.