Check AP Exhaust Products. I had their MSL mufflers from 1990 to 2003 on my 68' Coronet with 318. They are regular passenger stock mufflers .Excellant mufflers and lasted me 13 years. They are quiet and have the correct back in the day Mopar muffler sound. I always loved the way they sounded. They sounded excellant and the performance was really good. If you go on the AP Exhaust website they have downloadable catalogs for different year cars. These mufflers will have what your looking for.
When I replaced them in 2003 I should have went with those mufflers but insteadwent with their lifetime muffler and this was done at the same muffler shop.
To get a good idea of how they sounded go on Youtube and type in
"80 Steps to Jonah". It was a movie with Wayne Newton and Sal Mineo. Sal drove a gold color 69' Charger. In the scene you can hear the exhaust. Look for the scene where he picks up the young looking Wayne Newton.

Here is the link.
http://www.apexhaust.com/index.php/Catalogs