For whatever it's worth....
On my 06, loaded up extreme street and drove like that for a while, puked for a long time, went through all the hoops, got cap replaced, then EGR cooler replaced, then finally headgaskets with studs put in by the dealer. They also replaced one head at this time. I puked on the way home from that, but then it stopped. I think it was just overfilled. About 1 month later it started puking again (mind you I got my tunes updated but stayed with the non-stud tunes) and puked for a long time again, then finally it failed majorly to the point I had white smoke pouring out of exhaust and could barely keep the truck idling. Brought it back in, they fixed it, took my studs out, sent me packing and told me not to bring it back. I was very grateful for them to fix it, but now I'm back to stock TTY bolts. I have since loaded a looney tune up from Vivian at Quick Trick, and run it just as hard and no puking.... This tune is not as powerful as my Innovative tunes though, and the transmission unlocks the converter a LOT, so it seems like there is never a real load on the motor, I'm sure these aid in keeping the gaskets together.