Sorry this thread is kinda dated, but I noticed no replies.
I have a Full Boar, from Mountain Muffler, on my Bronco and the sound is perfect for my tastes, nice deep mellow rumble. It would sound killer with duals. I also ran one on my 94 Chevy C1500 nice rumble, but not obnoxious. I realize by now you have probably already replaced your muffler but maybe this info will help others.