RIO GRANDE MUD (SYEOR 2018 EXCLUSIVE)ZZ Top: Billy Gibbons (vocals, guitar, harmonica); Dusty Hill (vocals, bass); Frank Beard (drums). Also available as part of the ZZ Top 6 Pack. All tracks have been digitally remastered. By its second release, 1972's RIO GRANDE MUD, ZZ Top was honing the tough blues rock hybrid that would make it a certified U. S. arena headliner by the mid 70's. While the album didn't spawn the big radio hits of its later releases such as "La Grange" and "Tush," RIO