I got a question wheather I need less gear or not, or am I fine? Got a 78' cutlass with decent SBC, I've shifted from 6k up to 7k and it goes faster when it gets shifted at 6k. It has 4:56 gears with 29" slick. Goes through traps at 7k. I was just curious, there's over a tenth difference when i shift at 6k compared to 6500. Thanks!!!!