throwing on a set of bilsteins, steering rack bushings, front sway bushings, and a rear hellwig bar should firm it up for ya. if that don't do it, a set of 24's with low profile tires definately will 
Another thing to look for is try a dc with the tow package, this will get you a LSD and 4.10 cogs that really liven things up
Do you mean a DC TRD w/ the tow package, because I have a '06 DC w/ the factory tow package and I dont have a LSD.
are you sure your truck is a tow packaged rig? cause I have both on my plain sr5
Do you have a a 7pin trailer harness factory
Perhaps I'm mistaken and the LSD is an option not tied to the tow package. Either way I lucked out as my dc has one.
Perhaps we should make a poll