I have a 2005 F250 6.0. Right now it is stock with the exception of 4" dual stacks from Grand Rock. I'm going to be buying a tuner sometime this month. From what I have read everywhere, the SCT Xcal2 seems to be the one to go with. I have a few of questions about it though. Is it safe to drive around daily with the Street Tune? Does it blow smoke? If something does happen to the motor, can the dealership detect it if I put it back to stock? Thanks.