Re: 1969 Z28 Sound Dampening Installation Question
I know most folks probably wouldn't do this, but since I don't have a numbers car, I welded a sheet of 1/8" steel plating I had laying around across the entire back braces (trunk side) covering up the entire back seat area. Epoxied it and then covered both sides entirely with sound proofing/deadening. I then covered the trunk side with a layer of black fabric using spray adhesive. I figured that the added metal welded in would help the torque of the big block from being as twisty on the body. Other than that, I added sound proofing /deadening to the entire interior ( firewall, floor, doors etc. ) also while the entire upholstery was out during a total rewire. I put it everywhere except for the roof since I did not remove the headliner. Might eventually do the roof, but not anytime soon.
May you always have Summer in your heart and some Spring in your fanny.