The motor is 5.3 LC9 the trans is 6L80 six speed gears 3.42 . I put a 6 Inch lift on it and 35 tires. I am wondering what gears I should put with this set up? I am leaning towards 4.56 but dont know if its to much tow a boat with it and would like more low end . Was also wondering about tuners or chips have never used them always had H.P. in the past . what would be good mods for the 5.3? thanks for any input at all.