Like everyone has alluded too, adding weight is one solution but, you really need to look at the whole combination. Weight, tires and traction devices. I would seriously consider a set of Cal tracs and some good drag radials to start THEN start adding weight to get your truck to hook up. Moving the battery to the right rear corner and taking the fuel tank out of the cab and putting a cell under the bed in back would also move the weight bias to a more usable location. Just some ideas but, to get the truck to work like you would like, will require addressing all of the issues.