Stick down sound proofing ,Insulation?

I dont know of any mopar products that has hotter floor boards then an older C3 body Corvette because of the fiberglass floors and the exhaust running under them. On mine I used the Lizard skin and sprayed the interior side of the floor boards with 2 coats. The reduction in floor heat was unbelievable and the sound deadening was very good as well. They also make a special sound deadening lizard skin but I didnt need to use that on top. There is no smell and its not bulky when installing the carpets.
Rod