Suggestions Wanted For 408 Stroker Mufflers

I have the TTI complete system with Dynomax 17733 14" mufflers on my '68. I understand the desire for a loud exhaust and maybe 2-5 more HP, but I really want the SBD effect on my Cuda. Silent But Deadly is much more interesting as no one expects you to have the power that you do. But I cannot find information on quiet mufflers as essentially everyone wants loud exhaust noise. A stock muffler is only 2 1/4" inlet and I need 2 1/2" to fit the system unless I use a reducer.