Get an SCT xcal 2. Look at all the big HP 2v and 4v mod motors. They ALL are ran by SCT XCALs. They are a tad bit more adjustable and it reads codes on all ford makes. Not stuck to a certain band of years like diablow. If you ever got a new mustang or older or whatever, you can just have your xcal changed.
i have an xcal 2 and its great.
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