A tune right now will be a waste of money...get some headers and high flow CATS (minimum) and then get it tuned to see any worth while results.
MOST IMPORTANTLY...go to a ONLY A REPUTABLE TUNER. Don't know where you're located, but I would go over to the Tuning and Diagnostics section and request info from the vendors here. A LOT of bad tuners out there selling hack tunes. Do your homework, stay away from Chuck COW above all else.