Convertible trunk mat/sound deadening

Thanks for the info and pics. I definitely want to do all that eventually but can’t justify tearing the interior apart at the moment. I just got the car about 6 months ago and looking for quick and easy improvements for now because the car doesn’t really “need” any work.
You can remove the front seat, door sills and seat belt bolts to expose the floor. Then clean and treat any rust, tuck any dynamat or equivalent up under the firewall without removing anything else and then lay down some foil backed jute from Speedway Motors. Replace the carpet with fresh or replace the old, bolt the seat, seat belts and door sills back down easily in a weekend if its worth it to you.

I find bulk packs of Dynamat Extreme on sale at Amazon for about half off with free shipping whenever I need some. The double sided foil backed jute pad is available at Speedway Motors or at Aircraft Spruce.

Here's a quick note regarding how they insulate small airplanes for noise and heat. The Dynamat is used in strips to quiet and dampen the vibrations that the panels experience. Knock on the panels with your hand, and listen to them "ring". Then add Dynamat in strips until the panel vibrations/ringing is deadend. You can get away with about half as much Dynamat per panel instead of covering the whole surface. It's really the foil covered jute mat that does most of the quieting, sealing and insulating the majority of the noise, heat and vapors that pass into the cockpit. You can cut the jute mat into sections like a dress maker does to sew clothes and then seal all the seams and edges with that aluminum duct tape. It is more cost efficient and works better than how 90% of most people attempt to insulate their rides.