sagebel
Stock? Pfft!
Well, maybe..
White smoke is moisture, so that would be my first thought.
Now, I can see some as condensation burns out of the exhaust (would account for your muffler "leak"), but I can't see it after the truck has been run for a while, and surely not just under load.
Where does your CCV vent to?
I have about 200 miles since the injectors were re-installed. My first couple trip to and from work after the install there was a lot of white smoke. Much less yesterday. I'll keep watching the side mirror to see if I see any difference today.
CCV vents to atmosphere.