Yes, I started with a product called B-Quiet (http://www.b-quiet.com/ultimate.html ; much less expensive than Dyna) all over the floor, firewall and in the doors and then added http://www.heatblok.com/product.html. I plan to add another layer of foam and then carpet when I get some extra money. Makes a big difference as the original "sound proofing" was almost worthless.

Be careful when you take out the old pressed black stuff that is glued to your car's floor and door interiors as board members say it is made of asbestos. So, for safety, I used scrapers instead of sanding and grinding and also wore gloves and a mask.

I also laid down some POR15 as extra rust prevention after I took out the old soundproofing and before I put the B-Quiet Ultimate in there.