OK i got a bud that just bought a used diablo tuner. He bought it used from a guy that also owned a MACH. Question is...how could I use this to tune my 02 GT or cant I??? Would this be beneficial? Mods are gears, mid and catback exhaust, plenum spacer, timing adjuster (at 14). Along with full suspension and short shifter FYI. Any help appreciated, OH could I F my car up with the tuner?