Dad and I used a product called RoadKill, it is marketed as sound dampner. It was wayyy less expensive than the Dynamatt. The sheets worked well in the doors, installed on a sunny day outside temp about 75 degrees, used a paint stir stick to press it to door between the reinforcement and the door skin, 2 or 3 inch wide foil tape for the seams and the thing looks like a space capsule, we did the entire floor from firewall to half way up the trunk partition and in the rear quarters and the cabin half of the rear wheel wells. The stuff sticks real good.
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 "Lucy" 1971 GTO (dad's) A true clean one owner. all orig. #'s match, 400, 4 sp, P/S, A/C, Lucy Blue
"Buffy" 1969 Firebird vert (mine) Not a clean one owner. Born Carousel Red, 350 2bbl, A/T, P/S, P/B, A/C. Now, Primer gray. Will have a 400, 5 sp, P/S, P/B, A/C, Black with carousel red pin stripes.
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