Believe me, get the 4:10's cause there isnt much diff in gas mileage. Ill tell u this, if u have 3:73/sticky tires vs 4:10's/sticky tires and race 1/4, u will lose by 2 car lengths with equal drivers and same mods. If u are gonna spend money on mods, start off with the best so u wont hate ur self later by 1/2 steppin'.