I am wanting to regear my truck to help compensate for my tires and to get more low end power. My biggest fit is going down the highway to school even smaller hills I have to kick it and it will run to 2500-3000 rpm to even Matain speed. Other cars, trucks I drive will not do this. I currently cruse doing 60-65 mph doing right about 1500 rpm. Any suggestions on what gear ratio I should go with?