i own a 01 lb7, k&n intake, 5 inch exhaust (high flow muffler and no cat), 3"body lift and 33 inch tires, getting a lovely 14 mpg. Looking at getting a chip that will increase milage and if power comes so be it, i only have a stock tranny. Where should i go? i read lots of good things about quadzilla and even more about ppe, and no i dont have the dollars for efi live right now. What chip will help my milage the most?