Photo courtesy of brooklyneagle.com via dead.netThe Brooklyn Daily Eagle [http://www.brooklyneagle.com/articles/after-playing-bensonhurst-1970-grateful-dead-kept-truckin] remembers when The Grateful Dead, America’s consummate acid-jam band, rocked Bensonhurst over 40 years ago in a four-day-long concert. The event was held at Universal Theater, located on 46th Street and New