Modern Living: Muscle with Hustle

In last week's twelve-hour endurance race at Sebring, Fla., the one-two finish of the fast new Porsche prototypes was almost a foregone conclusion. But the performance of ex-Road Racing Champion Roger Penske's Chevrolet Camaros, which placed third and fourth, was a startling surprise. The Camaro, after all, is a standard road car, not a finely tuned racer. Penske's entries were no run-of-the-showroom models, to be sure; at a cost approaching $25,000 apiece, each machine had been modified for racing with the addition of everything from a souped-up 440-h.p. engine to disk brakes on...

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