Quieting my exhaust?

A large muffler case muffles sound better then a small one.
I'm using a pair of Walker Dynomax 17749 mufflers on my 500" and resonators behind the rear axle.
Toned it down quite nicely but still has a very noticable sound.

But you might not have the space for a large muffler in an A-body.
have you thot about a turbo (spiral ) insert in the size that will fit inside ur exhaust pipes? I used a pair of 3 1/2" bullet racing mufflers, w/ 3 1/2" spiral inserts pushed 1/2 way inside them , and tack welded. fairly loud , but not bad, and doesn`t have the cheap flowmaster sound .