For 3k you can sometimes find a used supercharger. I would suggest that if you have a budget to work with. Those other bolt on's can be done individually as you save up a few hundred here and there. Just my opinion. Or go with the tires/gears so you at least enjoy the look of your truck.
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Does anybody know what 4.56's and 35's will do to my rpms on the highway? I figured I would be about the same but my buddy that took auto tech in high school seems to think it will be revving way to high on the highway