Hi, Im fifteen, and I just got a 1964 c-10 chevy with a straight 6 292, its all stock, and its pretty slow , i would like to gear it up, to be able to drive the freeway W/O reving too high, and would like to just chage the rear end, and how much that would be yo gear it up, also I would like to know if gearing it up would help on gas milage. thanks
