1969 Barracuda 340 Formula S Restoration

RealWing said
It is not very heavy. I used approx 2 packs which is 30 lbs total. Dave Rea, one of the top Mopar restorers uses it on his restorations unless customers dont want it.
I will add a layer of 1/4” closed cell foam on top for sound absorption. This combination of damping and absorption that has the biggest effect

Aircraft Spruce in Branford has 1/4 inch aircraft insulation that has a foil layer on both sides that works great for heat and noise absorption. I used that stuff in combination with Dynamat. Works great.