i have a 2.8 pulley, 60lbs inj, intake, full exhaust, duall pass with opt b, and ingalls with trans mounts. i was tuning the car, but i cant get decent gas mileage.... car runs good tho.... i wanted to get the gm stg2 tune and adjusting somethings that i could change, like inj flow rate charts and other things, but i need a good base gmstg2 tune..... if any1 can help me out, plz pm me and let me know