383 Magnum- Changing mufflers- Will motor need adjusting?

[MoparMotel]

383 Magnum, 10:1 compression comp cam 470 lift stock carburetor stock hp manifolds. 2.5 dual all the way back no H pipe. I've got 2 Dynomax super turbo mufflers on the car now, and while they are deep they are not loud at all, actually pretty quiet. I've got a wild hair to put 2 Cherry bomb extreme's which are a single chamber muffler. Will the car need any carburetion or any other adjustment? I've heard these on a classic car before and when letting off the gas the car would pop a little bit. Is this due to less backpressure?

Here are the mufflers I want to go with. I don't drive the car much at all but love the louder sound especially with the cam.


http://www.amazon.com/Cherry-Bomb-7426-Extreme-Muffler/dp/B0018GSVG0