Ok,, for what it's worth...
Mike (salesguy) ,, over at Pat Clarks Big Dog in Vegas. Has been in Vegas 8 months or so. Before that, he used to BUILD some of the motors at BIG DOG. In fact,, he's going to pull out his "little black book" and let me know,, if he built mine. To cut to the chase. in 2004, some early engines came with a the .600 cam. later they came with -something like a .585 or .542 or .535 anyway- i can't remember off the top of my head. He is going to tell me, when i stop back down there,, after the holidays. When i called the factory,, gave them the VIN number,,, they told me,, it was not a .600.. . but one of those others. I've got it written down. Just don't have it in front of me. As i am visiting the Parental Units, until after Christmas. Whatever it is,,, it pulls good. My dyno sheet,, has a great profile..... and i'll see more,, when i get the TAZ installed.
I hope that helps.