Warlock race mufflers
with a pair of e-cutouts on them, if the bolt pattern is the same. 
Back in my foxbody mustang days, I had a couple buds who ran those and they sounded wicked for sure. It would be "challenging" to mount mufflers of that size under an fbody without some major floorpan massaging (talking true duals of course).....unless you don't mind sweeping the roads with your mufflers. 
Maybe mounting one on a y-pipe setup on the stock location, mimicking the slp TOTL??....
Maybe mounting one on a y-pipe setup on the stock location, mimicking the slp TOTL??.... 
We used to run these, for tracks that required mufflers. With the caps on the cutouts, we saw .2 ET difference on a 10.8 setup. The bolt pattern for the caps are the same as a traditional 3-bolt flange, so yes E-cutouts would work on them.
