As Congress threatens to raise fuel-economy standards, OPEC manipulates the flow of oil and gasoline prices rise another 30 cents a gallon, what is the auto industry offering in response? More horsepower, according to the Chicago Tribune. This year carmakers cite consumer demand in selling performance over economy in a horsepower race reminiscent of the 1960s muscle-car era, before the first OPEC oil embargo or federal fuel-economy standards. Among performance-oriented products announced this year, Ford Motor Co. will build the GT40, a reincarnation of a '60s racecar that in concept form boasts more than 500 horsepower. Pontiac will resurrect its GTO muscle car with a V-8-powered coupe imported from Australia.