Got the ECO tune on Friday, swapped the ECMs when I got home from work. I did the exchange route.
First impressions are WOW!!!, it really wakes the Libby up. It doesn't require as much throttle as before to get going, engine runs smoother, and to me, the trans feels like it shifts a little smoother too.
See how much the fuel mileage comes up since the wife drives mostly highway to & from work, and the fun factor wears off. It's a lot more fun to drive now.
Also want to send a big thanks to Keith. Had a small SNAFU ordering it, called, and he helped walk us through it.
