yeah I use a Super Chip in my O4, love it! also put in a scan gauge. to keep track of things, I would say go for it, do the air box mod and tow away!
Rob has a good point with the underdrive and tune up and gearing. but changing the gearing will certainly change your fuel mileage, not to mention confusing your speedometer and transmission shift points
04 Ford Ranger Edge
3.0 V6 Auto SuperChips Programer
air box and blinker mods