3000 stall convertor and 2800 highway cruising

there are plenty of times i wish i could just put it in drive and go. when i started planning this car i looked at my dart and thought what would keep me from driving it on long trips, the biggest things all point to mpg, the big stall converter, the 3.73s. could go with a gear vendors, but without a lockup converter even that i dont think is worth it. the t56 wasnt too bad price wise, and on the highway it is nice. oh there actually is no linkage for the clutch or shifter.
you could go with the gm 4l60, but that is anything but cheap and it actually has the same od ratio as a 518, but its computer controlles so you can fine tune it, and i think you have a better selection of converters.