Sound deadener install

So, my final decision was a combination of all the above comments, lol. I decided to order the 50mil kilmat. I have it up under the firewall insulation about 1/2 way up. I have the entire cabin floor covered, doubled in some areas. I will be going all the way back to the brace behind the rear seat, and, if I have enough left over, may even put some in the doors and quarters.

I too have the carpet with the heavy jute backing waiting to go in after final paint.

I have some hushmat 60mil (I think) that I got off marketplace that I will be using on the inner roof. It is the back foil style so it won's show through the holes in the headliner.

Thanks for all the responses.