For the first time in recent history, I believe, Chevrolet has the opportunity to overtake Ford to claim the best-selling-vehicle title. The F-150 has been the top-selling vehicle overall in both Texas and the nation for the past several years, outpacing even the sales of the Ford Explorer, which has been the best-selling passenger vehicle., , The frame is stronger than before, the V-8 engines are all new and more powerful than ever, and even the brakes are far superior to those of the previous Chevy trucks and any of the competition. Four-wheel disc brakes are now standard across the line. The base engine is a 4.3-liter V-6, standard on two- and four-wheel-drive 1500 models. It cranks out 200 horsepower and 260 foot-pounds of torque. There are three Vortec V-8 engines to choose from, all new but based on the legendary small-block V-8 design. The 4.8-liter engine is rated at 255 horsepower and 285 foot- pounds of torque; the 5.3-liter at 270 horsepower and 315 foot-pounds of torque; and the biggest, the 6.0-liter, at a whopping 300 horsepower and 355 foot-pounds of torque., , To me, though, the interior is the Silverado's best attribute. The extended-cab models have a back seat that is really a seat and not some short, ill-designed attempt at one. There is support for the thighs and plenty of leg room even for adults. About two-thirds of pickup buyers choose extended-cab models because they need the extra passenger space, but only the Silverado (and its clone, the GMC Sierra), offers a truly practical rear seat.