I have a GMC Serria 4.3L I bought a hypertech just recently, after I bought it quit a few people dislikes it but it mine now I would like to know how to set it up correctly i just set the shift firmness at 50% more and thats it I kept the rest at stock other than the octane choice that is still at 87.Thanks for any help. Want as much performance as possible I added the k&n induction One into two mufflers