Yeah, for the highway, you can add an AOD tranny and get much better mileage than with a standard C-4 or 4 speed transmission, but it costs to make the conversion. I just wonder how long it would take to pay for a new overdrive transmission just to save a few bucks on gas prices? I agree that the 350 gears are kick ass gears, but the 373's will give that added punch from light to light and on the strip, which is what he wants.