I used Peel & Seal from one end to the other on the 73 Camaro. Its a poor mans Fatmat. Sticks on its own great, works excellent as a heat barrier and sound deadner. You can buy it at Lowe's. Did my whole interior firewall to back deck, doors and roof for about $130
http://www.lowes.com/pd_154017-81326-PS625_0__