Try clicking through to the dealership 800 number (maybe it's an 888 number). They answer that line immediately since it's the new car sales floor.
SLOW5.0: My numbers are 284 rwhp/ 312 tq on AFM's dyno, with a dyno tune by Danny on a PMS. So, obviously I am curious about your mods. My sig is accurate (except the gear, which are 3.73 now). Are you running the track heat intake???