BobE wrote:

Over twenty years ago, I used “Quiet Ride Solutions” sound deadening and insulation kit made for my fastback for the passenger compartment.  This excluded behind the rear and trunk.
 
A few years ago, I used “Noico 80 mil" (2 mm) Sound Deadening Mat & "Noico RED 315mil" Sound Insulation, purchased through Amazon, for behind the rear seat and trunk.  These came in squares that one can cut and piece together to fit.
 
I can’t say one is better than the other, and I have no compassion with Dynamat.   
My only suggestion would be to buy the custom fit for the firewall and maybe the floor as there are many curves, recesses, etc. to deal with.

My last 10 years doing the aeronautics  job was getting the cockpit electronics in the f35 to survive 135 dbn noise.  I found lots of data about "vibration dampening ,, ie Dynamat" and sound blocking.   my short take for my mustang was to use Dynamat ((lowers panals vibration generated noises)  on 10 %  of open spaces of panel.  On out side noise,, ie tires, wind , turcks passing.  I found sound Blocking material worked best,,,  for low freqs I used 1/2 inch thick mass loaded vinyl.  High feq I put 1/4 in thick foam on top of vinal.  I made paper templates of sections I covered.  The sterio/ music industry has lots of data on how to block sound.  There is lots of noise test data showing outside genererted noise goes thru dynamat ???   THEY DONT LIKE THIS.  ??  I didn't cover everything need but my starting point measurments in the interior was 84 dbn at 70-75 mph.  After install is 73-78 dbn 70-75 mph.   Outside wind speed/direction has a lot to do with generated noise.   My guess was to cover/cacoon the interior shell.  after a few years it has appeared a lot of noise energy is generated by tires that I thought were blocked.  I research Mercedes Enterior noise and they block wheel wheels with simialar system I used. I didn't believe it (go figure)  so I went around and "fe

Dang  to much going on,,,   had to cancel  ,,   We are sooo sorry to Bobs family         
 

yep  ya worked all night and finally got er done  

nice  I never looked here,,,, my car has a hidden leak and bet its in this location     BUTTTTT  dont want to remove fender     dammmmm  ??

The first photo was my wifes car.   Yep I got to rebuild its  4 cyl engine,,, fun fun fun,,,,   silly 
 wife is ,, not car  

hadnt seen this     seems soooo wrong but funny  

https://www.youtube.com/shorts/zzvALjBdxdI   

great video on engine manufacturing  

yep i'm buying a new 302 from here  

https://www.youtube.com/watch?v=Jzr2U8bGpvc

The old emberglo girl had engine problems. After 21 bashes It  has a fatal problem that couldnt be fixed at a gas station in middle of far west Texas.   I now call her my trailor QUEEN.    We missed the trip and missed meeting up with everyone. We so wanted to visit that part of the country.   Sooooo who/where/when is next years bash ?   I have to schedule my engine replacement (maybe fix it) because I have shoulder surgery oct 24 and doc says I'm not going to be able to use right arm for 3-6 months ??? like thats NOT going to stop me.  Again so sorry we couldn't meet up with everyone.

saw this on line.  Squeeky 65 mustang brake.  

Booked today 5 17 24     The old  Emberglo Girl will make the trip.  I 'll also drive my mustang.   Maria told me I got the LAST ROOM.