The sound of East Los Angeles is spreading far and wide with the November 29 release of a new 4-CD box set. Land of 1,000 Dances: The Rampart Records Complete Singles Collection, which arrives on Black Friday’s Record Store Day, offers a comprehensive overview of the groundbreaking Mexican-American rock coming out of East L.A. between 1961 and 1991 on Eddie Davis’ Rampart label. The Minky Records release is limited to 1,000 units. Minky has previously mined the Rampart family of labels via single-CD collections dedicated to a pair of artists that appeared…