I know yours is a 4x4, and I guess others posting about a front "track bar" are talking about the front sway bar. That said, checking your front sway bar bushings and links is a good idea. Just had to have links and bushings done on my '05 3500 2WD at 66800 miles. Biggest difference I noticed is the creaking, groaning, and screeching racket in the front suspension is gone, and the front end doesn't dip like it did with hard cornering left or right, or with abrupt movement of the wheel in either direction.
A B&W Companion fifth wheel hitch would cure a lot of your pinbox/towing ills, but it would also require purchase of the B&W Turnover Ball hitch to use it. Together, that would set you back about $1200 or more. A MorRyde pinbox might be helpful and less money. Check
tweetys.com, they have some of the best prices on the Web for hitches and pinboxes, and frequently offer free shipping.
