Come on, man. "5D," also called "Fifth Dimension," on the album of the same title (The Byrds' third full-length LP) was released in the summer of 1966 (it also included "Eight Miles High," Gene Clark's last sessions with the Byrds before splitting to go solo (he returned briefly in the fall of 1967) and Jim (later Roger) McGuinn's extraterrestrial rockabilly fantasia "Mr. Spaceman"). By '68, the band, by now without founding drummer Michael Clarke (no relation to Gene Clark) and rhythm guitarist David Crosby (yes, THAT David Crosby), and under the sway of hippie-cowboy renegade Gram Parsons (no relation to later Byrds member Gene Parsons) had moved into full-fledged country and western with the "Sweetheart of the Rodeo" LP. Get your rock and roll history straight, man. 5D was straight '66, early psychedelia; by '68 the Byrds were moving rightward musically, toward good ol' C & W. They even played the Grand Ole Opry in '68.