for sound deadnr, try truck box spray on liner (RHINO LINING), that stuff is alot better than undercoating. Or some speaker places sell Dyna-Mat, it's very expensive but is a good deadnr and insulator, and comes in rolls or squares, I think Eastwood and most Mustang suppliers sell it too.
I used the dynomat in my last car. It was a great sound deadener but it was REAL heavy. I was hoping to find somthing to use as a soft backing for the carpet. Any ideas on what the street rod guys use? It looked like thick purple blankets with alum on both sides.
The B-Quiet site is great Haven't seen any cheaper prices. Anyone know roughly how many square feet for a 70 Mustang? Floors, firewall, over the mufflers and diff, rear wheel wells, and maybe doors - would 18 square feet be enough?
The stuff in the JC WHitney book works perfectly and sometimes you can get it at the local Pep Boys!Another cheap and effective method is the stuff they sell at Home Depot, Lowe's etc, It's the aluminum foil backed with the air pockets in it , very light and easy to work with, I think they keep it in the furnace insulation dept,