2011 Ford Shelby GT500 finally gets aluminum engine, loses 120 pounds

Ever since Ford introduced the modern Shelby GT500 four years ago, almost no one has complained about the prodigious power levels produced by its supercharged 5.4-liter V8. With as much as 540 horsepower and 510 pound-feet of torque in the 2010 model, there was no shortage of grunt. No, the issue was an excess of mass.Before the contemporary GT500 was born, Ford had a blown aluminum block 5.4-