This is the legendary "CadZZilla", commissioned by ZZ Top's Billy Gibbons, designed by Larry Erickson and built by Boyd Coddington. It was on display (and was street-driven to) the April 2005 Longhorn Hot Rod show in Austin, TX at Auditorium Shores. This photo was taken by the (uploader) and is licensed as CC-BY-SA 3.0.