Does it have a factory MPG gauge? You want one that offers both instant & resettable "trip" (average) MPG or L/100km. This is crucial to adjusting the nut behind the wheel. With the amount of fuel you're going to be burning, don't fool yourself into thinking you don't need or can't afford one - false economy!
Second: ScanGauge or equivalent will also let you accurately monitor coolant temperature, and possibly transmission temperature - important while running partial or a full grille block.
Thirdly, you should know from reading here that after reducing speed, the most effective improvement you can make to a pickup for highway fuel consumption is an aero shell bed cover. You should try very, very hard to organize your gear so that it will fit beneath one.
Adding a traditional square topper will likely reduce fuel economy compared to a tonneau cover, and probably even below an open bed.
Other mods listed make sense.
Lastly - woohoo, funk band!! Got a link to share? YouTube?
