The 2007 Ford Shelby GT500’s presence, from the raised and vented hood to the deep rumbling exhaust, suggests some serious internal combustion angst, and sure enough, a simultaneous lift of the clutch and drop of the throttle prove the goods are there aplenty. Power for the Shelby comes from an supercharged 5.4-liter, 32-valve V8 with dual overhead cams that’s good for 500 horsepower at 6,000 rpm, 480 lb.-ft. of torque at 4,500 rpm, and 0-60 mph runs in the low four second range. The block is cast iron, whereas the heads borrowed from the Ford GT are aluminum. A boost gauge tells how hard the Eaton supercharger is working.