Even supercharged applications run fine with the stock set up. The only differences from a hollowed cat to a properly operating cat are obnoxious eye watering fumes and enhanced mono-tone drone. Save your cash and purchase a set of headers along with an Xcal. Since your truck is 2wd, post up the axle code or gear ratio you have. Regearing one axle isn't going to bust the bank too much, but the performance gain (depending on your current ratio) might be a good investment.
A word of advice though, a 3.0L is only so much. I did a LOT of work to my old 3.0L and it still didn't compare to my now stock 4.0L V6. I ran crane 1.7:1 rocker arms, a ported intake and ported heads. Headers, ignition... yea, it was really cool at first because NO ONE had done that much to a 3.0L and later I figured out why.
Welcome Visitor! Please take a few seconds and 
