You've asked this question in other threads and the answer is the same. Anyone who has a tuner package for your year and body style (truck, f-body, y-body etc.)can do the job. You can either go with a vendor (Allen) or someone else who has the software for their own personal use. If you are going to tinker with the PCM you might as well do your tuning at the same time to save money. If you are really bucks down, there are vendors who tune for a lower price but the term "you get what you pay for" may apply here.