I ended up adding a little extra insulation around some critical areas where exhaust heat from headers, intermediate pipes and mufflers are routed as well as the back seat divider.
https://www.thermotec.com/products/s...hermo-guard-fr
I found that the extra barrier helped fill in the carpet better.
To punch around bolt holes......take a piece of thin diameter pipe 3/4"-1", grind a bevel around the tubing then hammer at areas that you need to fasten stuff to, makes a nice clean open area.