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Message: [QUOTE="B585Ford, post: 1069366, member: 5497"] OP, As Madman stated, I don't think the information you have received is entirely accurate. With factory tuning, you won't have to worry "overpressurizing" the engine (not sure if you are referring to Boost or EBP). Deletes are definitely a good thing and that will require aftermarket tuning. There are weak links in a 6.4. If you run hotter tunes (tunes that make about double the HP from the factory) and have a heavy right foot, sooner or later you will probably need to do head studs/HG. Pistons are crap shoot. It seems like heat is the biggest factor in whether they will crack. Bottom ends on a 6.4 are very stout. The factory valvetrain is pretty decent, but with hot tunes you do have to watch the EBP at WOT if you keep compound turbos. In your case, my guess is that compounds would be the best option for you since you plan to do an 8" lift and run 37s. The lift and tires will definitely slow spooling which is why I don't think a single would be optimal for you....especially if you plan to drive it on the street. [/QUOTE]

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