Something different Building for MPG.

Dave, Your motor is very close to min. Only difference is mine has worked 302 heads with 1.88/1.60 valves instead of the Magnums and currently has a torker intake. Im still up in the air with what intake/carb Im going to run and if Im going with Headers or manifolds.

What year is your Dakota ? Mines a 98 Sport, club cab with 391s and 31X10.5-15s, 3.9L auto. The millage is no were near as good as yours.