I'm not sure what you mean by "blueprinted builds". Blueprinting means taking the engine and making it as close to the original engineer's tolerances back when the engine was designed. Since there was never a 408 from the factory, this is impossible.
What you can do is make sure that the crank centerline, cam centerline and block decks are all within specs. At least that's what my builder is going to do. My build link is in my signature.
