It will be a matter of preference IMO for the custom or canned on your truck if it's stock. I am sure if I am wrong someone will correct me but the stock tunes are a very generalized setup for varying fuels, altitudes, driving habits, etc so I would prefer a custom one even if my truck were stock. There will not be the large benefit like if it was modded, but it would still be better.
Having said that, Corey and Bill will not try and sell you something just to make some money like other tuners and they make that point very clear everywhere they post. If you really want one they will give it you, but they will not push it on you.
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