Glow Plug Day
So the 6.2 has been hard to start for awhile when cold. Lots and lots of cranking. Once it actually fired off and warmed up, it started no problem all day.
I went ahead and ordered a set of AC Delco 60G's to swap in, as well as the Leroy Diesel glow plug removal tool.
Today was the day to tackle this work. My fears of swollen plugs were definitely real, as the first I removed from cylinder #1 got stuck. But the tool from Leroy Diesel came in clutch. All in all, 4 out of the 8 required the puller. I was pretty nervous of breaking a plug, but no problems.
Here are the old ones, arranged as you would look at the front of the engine, along with the whizzbang removal tool:

The few that are shiny and wet are because I shot them with some WD-40 to aid in the removal.

A quick ohm test reveled that only 3 of the 8 were good!
I can't believe it even started!
Not sure the vintage of the old plugs, but they are stamped with a 120:

After installing the 60G's, the old girl fired up immediately, first crank and one glow plug cycle and its only about 34 degrees out today.
I also picked up one of the super rad
@hillbillywizard Glow Plug controller cards, with the fancy LED's, and swapped that in too. There was no issue with the old card that I know of, but I wanted a spare as the cards are getting hard to come by. Plus the LED's let you know the status of what's going on.