So, yes, it has been awhile since I've updated this project - and for a good reason. Finally, over the holidays, I have had time to work on the next step.
To start, this time I am
really tearing it down:
There are a lot of little pieces that make up the interior - whew
Now, I've got 140 square feet of this stuff to get in there:
I was surprised at first that it was not silver-backed like the dynamat I used in the last truck. However, once I started working with it, I discovered that with a heatgun and a saturation roller I could get results like this:
I am way too anal when it comes to this sort of thing

I completely did the entire floor/backwall and firewall as though it had to be waterproof:
That was about 22 hours worth of work. This also allowed me to totally clean up all my aftermarket wiring.
So tomorrow is to figure out how this puzzle goes back together and hopefully get the rear doors done.
.