Almost stock. The Dakota has a cold air intake simply because I found one for $20 and it sounds cool. The tires are stock width but lower profile (no one makes a 255/55R17 anymore) and a more aggressive summer compound. That means something for rolling resistance (?) and my odometer reads low.
The Dakota is not made for economy. Therefore, it has none.
During the course of upgrading the Dakota's performance, it may incidentally pick up some economy. Freer-flowing exhaust, higher compression, and freshened-up componentry may contribute to future fuel economy gains. But, if adding an extra 100hp brings it down to 10mpg, it's not really a big loss. That's what the Honda is for.