Do your towing and hauling requirements run toward the super-size category? Were talking about pulling things like six-horse trailers, 35-foot boats and travel trailers that resemble rolling luxury condos. If so, then a 1-ton pickup truck is the obvious tool for the job. Fords F-350 Super Duty is the companys entry in this draft horse segment, and a number of major improvements for the 2008 model year push this capable beast of burden to the front of the pack. Its now at 6.4 liters, versus 6.0 liters last year, and features twin turbochargers (a small one for quick response off the line and a larger one that kicks in to beef up the midrange) and common-rail fuel injection with high-tech injectors. Because these injectors administer fuel in up to five metered spurts per combustion cycle rather than all at once, reliability is improved, emissions are reduced and the engine even runs quieter. Another benefit is quick startup — this diesel can fire up in under 2 seconds at minus-20 degrees.