This episode's headline: Arms Dollars for Salvador; LTV-Republic Merger; Short Hoe Controversy; God's Pocket; Super Tuesday Analysis. The guests include In Washington: Rep. GERRY STUDDS, Democrat, Massachusetts; Sen. TED STEVENS, Republican, Alaska; HERMAN SCHWARTZ, Antitrust Lawyer; In New York: ROBERT SQUIER, Political Consultant. Byline: In New York: ROBERT MacNEIL, Executive Editor; CHARLAYNE HUNTER-GAULT, Correspondent; In Washington: JUDY WOODRUFF, Correspondent; Reports from NewsHour Correspondents: KEITH GRAVES (BBC), in Lausanne; KWAME HOLMAN, in Arizona; A. C. GREENE, in New York