TTI exhaust muffler option

I used to run TTI 2 1/2" h-pipe exhaust with super turbos and stock 340 exhaust manifolds when my orig 340 was in my car. Drone was terrible at part throttle. I dialed back the amount of vacuum advance with my adjustable advance unit and that got rid of the drone. I run ultra flows now but with the headers and a well balanced and well tuned engine no drone and not loud at all inside the car. When I step on it most of the noise is the carb sucking in air, that is the dominating sound, not the exhaust. Everyone's combo is a little different and ppl have to realize tune can affect exhaust sound.