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How much power are you going to gain? Especially a pretty much stock engine and speed density. IMO I would not do a chip unless it's for other things such as how the tranny shifts, shift points, rpm rev limit, etc. Other than that, I don't think gains with chips on a gas engine, especially speed density, is worth the cost/non-oem part on the vehicle. Also some do require premium gas, depends on what the guy burning it for you does for you, but I would weight HP vs cost gain and ask yourself if you really think it's worth it. I was set on a chip, but after everything I read online, on a stock SD engine, you won't gain much. But like I said if it's for other things like tranny, etc, then it might be worth it. That's all I can add, as far as technical, I am sure fireguy can prove me wrong, but I don't think you will see much unless your engine has some other mods.