X2! Get some cats put back on and re-evaluate. If you wanted to start fresh you could get a '98 Trooper exhaust setup. I have one that runs a single cat with the cross-over before the cats. This guys on CL is selling a dual cat setup that looks just like ours from an '02 Trooper. He's asking too much but the picture may help.
http://denver.craigslist.org/pts/3733244582.html