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just got my email from hemifever over at aol, he wanted to let us 05-06- 4.7 owners know that they have just finished up a batch of programmers for our trucks. the 07 are not supported yet, but will be soon. at 599.00 each these better work you can drop him an email at www.hemifever.com
SCT is good shtuff... so I am going to guess that he can calibrate for wheel size and taylor to your specific needs. (depending on your mods and such...)