[comptiger5000]

Keep in mind, under light load at cruise, this won't make any significant gains. The gains would be had in city driving where the engine is under more load when accelerating, or when towing (or climbing a steep hill). In those situations, more low end torque means you can keep it in the good part of the BSFC curve (low rpm, high throttle) more easily, as you don't have to rev it as high to accelerate, and don't have to downshift as much when pulling.