Sixty years ago when Big Dave Ragus knocked out three guys to win the Wisconsin Golden Gloves heavyweight championship, about 16,000 fans crowded the Milwaukee Auditorium for the annual amateur boxing tournament. Plenty has changed since then. When the three-night state Golden Gloves tournament starts next Saturday at Memorial Hall of Racine, they'll be lucky to get a tenth as many customers. There were about 200 boxers entered in 1950; now 60 is a bumper crop.