Well got out the remainder of the old "Dynamat" today. The black stuff in the photo below. Tomorrow I'll start on the original factory sound deadener.
The honeycomb looking stuff at the bottom of the photo. It's messy but not really difficult to remove. It consists of an 1/8" thick tar paper like material.
From the looks and feel of the stuff I removed from the roof and doors the product is primarily made of asphalt. That's because it's cheap to produce.
I've found if I soak it in turpentine for about a minute or so it devolves into a sticky goo. I then heat it a bit with a heat gun. Then scrap it off with a putty knife.
This method will remove about 90% of the stuff. After that it's old rags soaked in turpentine and lots and lots of elbow grease.
This part should take me about 5 to 7 days, working 3 to 4 hrs a day.

I also ordered new seats today. I decided to go a little crazy and I ordered custom leather, buckets. The seats will have fully adjustable electric lumbar supports,
and a massage system. According to the literature it has eight transducers, to provide deep penetrating massage action to the, upper back, lower back, hips and thighs.
You can choose relaxing vibrations from all transducers or select any single point. It also has infinite vibration intensities. If it's only hals as good as it sounds,
I may have to schedule a round trip to Florida or something to check it out. They only have to come from Los Angeles, so they should only take a few days to get here.