SAO PAULO/DETROIT - Ford Motor Co. said on Tuesday it will close its oldest factory in Brazil and exit its heavy commercial truck business in South America, a move that could cost more than 2,700 jobs as part of a restructuring meant to end losses around the world. Ford previously said the global reorganization, to impact thousands of jobs and possible plant closures in Europe, would result in $11 billion in charges. Following that announcement, analysts and investors had expected a similar restructuring in South America. Ford Chief Executive Jim Hackett said last month that investors would not have to wait long for the South American reorganization plan. The factory slated for closure is in Sao Bernardo do Campo, an industrial suburb of Sao Paulo that has operated since 1967.