When ZZ Top came out of Houston in the early ‘70s ... top of their beer-soaked rock ‘n’ roll and scored the biggest album of their career, ‘Eliminator,’ which yielded radio classics ...

All three albums have been issued since the last full recording of new ZZ Top music (“La Futura” in 2012.) So what dictates if an original tune Gibbons cooks up or a tasty cover he has devised ...