In light of what I have read on here I have tried to take insulation very seriously. Is the lizard skin sound and heat control enough on the firewall or do I need something like the thermo-tec on top of that? Here is what I have so far:

I have put 1/4 inch heat barrier on the exhaust starting at the firewall back to the rear exhaust of the car. I do not currently have anything on the headers. I have put the sound and heat control lizard skin on the floor pans, tunnel and firewall, and I am going to put thermo-tec on the floor pans before installing the carpet.