I have a icon 8in lift. I plan to run 38 15.50 or a 13.50 wide tire on a 12in wide wheel. I know fuel econ and big tires and lift do NOT go togather! But is there someone that has a 6.0 with 38 tires that could give me some feedback on the benifits and downfalls. And the quartermile with a sct race tune with the 38's.