|Be there or be square.|
According to that infallible source Wikipedia, ZZ Top created its signature sound during its first decade, 1973-1982. Let's use 1978 as our half-way mark thorough that decade and do a little arithmetic.
In 1978 I was a 20 year old undergraduate.
2014 - 1978 = 36
1978 - 36 = 1942
Somewhere I have a