I definitely wouldn't be running around with it smoking like that. It clears up in about 30-60 seconds, depending how cold it is. If the truck is warm it won't smoke at all even if the truck has been sitting.
I unplugged each injector while it was cold one by one, except for #8 as I didn't feel like pulling the FICM. Still some white smoke with each one pulled, so I'm thinking it's #8 that is the culprit. It's one of the few injectors that hasn't been replaced.
I ordered a new injector. The truck also passed the bubble test, so no cracked injector tip, or fuel leaking into the cylinder, which were both a concern. I think im chalking up this one to just an injector in extremely poor condition. will update.

 

When I had a bad injector it wasn't as bad as that but scared the bejesus out of me. That was just 3 years after I lost a cylinder, so I was primed.

 

 

Dropped a glow plug tip, probably from cycling them when it was very cold. Overheated and stressed. 7.3L had a bad habit of doing that, which is why the 6.0L has a Glow Plug Control Module which kicks out when the voltage is high.

Heat the plug up, recycle the ignition switch to restart the cycle, but the PCM doesn't know how hot they are from the previous wait-to-start cycle. Ya just can't idiot proof everything. The heating elements may limit current flow as they heat up, but you can still overheat the tips.