King of the Road Shelby GT500KR Finds Extra Horsepower

Apparently Ford's uprated Shelbyfied Mustang GT500 — the GT500KR or "King of the Road" — is getting a touch more horsepower than expected. According to Blue Oval News, after Carroll Shelby visted Ford's Dearborn Proving Grounds this past Friday, Ford increased its horsepower projection of the KR from 540 to 550. Was Ford being coy in the face of competition? We have no idea, though with the top-line SuperSnake on the way, sporting 600 or 725 horsepower, such tomfooligans are wholly unnecessary. Could a 650-hp, Viper-engined Challenger be in the cards? [Blue Oval News]