Thought I would get advice/opinions on this topic. I see the felt options but wondered about adhesive backed? Seems to be a lot of products available.
You'll just want a square of it on each rear quarter panel and a couple squares on the roof. Perhaps behind the door panels too if you're inclined. It will just keep it from drumming like a barrel when driving. Adhesive backed which should be available from minispares next order you place. Later models used a fabric material glued to the ceiling.
I took mine further as I'm a music guy and will have an amp/sub and a set of 3 way separates. I got a package of dynamat super light from crutchfield on sale or clearance. I'm also planning to do the floors and foot boards with a product called membrane from restomodair. I know it adds some weight but will increase my audio experience significantly. Only thing I enjoy more than driving is listening to music, at the appropriate level too.
As far as install with the adhesive stuff, I made a bunch of stencils out of a roll of brown packaging paper. Then used a razor blade to cut them out and rolled them on with some cheap rollers from Amazon. Places I couldn't really get with the roller some hand pressure was plenty. I did clean every where first to help adhesion. Stuff was very flexible and easy to work with.