We now have some really nice, original style Mustang Carpet Underlayment and Sound Deadener/Insulation. I just personally used some in a car, and it is really nice. I'm really happy to see this product become available.
It's available for the trunk, under rear seat, under carpet, and above differential area. Click on the Blog post link for the complete list:
I saw this the other day on your site...Very nice
1967 (11/2/66, S.J.) Luxury Coupe, 289-4V w/Thermactor Emissions, C-4, Well Optioned
2005 (04/05) GT Premium Convertible, Windveil Blue, Parchment Top w/Med. Parchment interior, Roush Body Appointments