Ralph Houk was a lucky man, in more ways than one. When Casey Stengel left the Yankees, Houk took over, winning World Series titles in his first two seasons — the first in the midst of the chaos of Maris’ and Mantle’s assault on the home-run record in 1961. But a main part of Houk’s legacy was away from the baseball field, and on the battlefield, where he survived some fierce fighting during his service. Houk, 90, died Wednesday at his home in Florida. The longtime manager of the Yanks, Tigers and Red Sox served in World War II in…