Big block exhaust is still loud

I doubt the reduction in noise will be much.
The 3" kit I have now needs some tweaks to be heading out the back the way I want it so Ill need to visit an exhaust shop for that. Ill finish it out and if its too loud still, I can easily cut in some resonators, or glasspacks of some sort......I still cant see the difference between the two. A resonator looks like a short glasspack to me.