Walker Quiet flow mufflers ?

Thanks Tom, I appreciate that! I'm gathering information for the system now, trying to determine whether to buy a pipe kit with mufflers or no mufflers. I'm like a lot of these other guys that wants a nice sound, not too loud. I really like the sound of Milehighdart's system. That's why I wanted the OAL on the Quiet-Flows. What is the maximum length for the a-body? Seems to be around 18 to 20 inches?
I have a good pair of Silver Knight? 2" mufflers that came on the car. I thought about buying the adapters for 2 1/2" pipe and installing those until I found the particular muffler that I want to settle on. If I can get the OAL for the Quiet-Flow, I can mock-up these,install, then swap out later. I want to be satisfied with the sound level before I do the final installation. Thanks