Along with a fair amount of talent, Stan Musial has enjoyed a remarkable string of good luck over the years. Now senior vice-president of the Cardinals, Musial was still playing in 1958 when a plane he was on lost one of its engines, then made a safe emergency landing. Last year he won a new car in a raffle at the Pittsburgh ball park. Most recently, he happened to be on a Los Angeles-bound jumbo jet that ran into turbulence, tumbled passengers around and caused some 25 injuries. Stan the Man? He was up in first class, where, he admitted, it was "scary," but not so's you'd notice. He didn't even have his seat belt fastened.