Guercio's attention was not only on the big-time artists. In 1969 he encountered street poet and musician Moondog, going on to produce two albums with the eccentric character; on the second he performed vocals with Moondog and the artist's daughter. Guercio produced the Firesign Theatre's single "Station Break", which was released in November 1969 (and later appeared on the "Forward Into the Past" anthology), and in April 1970, Guercio produced the "Shoes for Industry" segment of their classic LP "Don't Crush That Dwarf, Hand Me the Pliers". In addition, both "Dwarf" and Firesign's earlier "How Can You Be in Two Places at Once When You're Not Anywhere at All" were labelled with "Poseidon Productions: A Division of James William Guercio Enterprises Inc." He even joined The Beach Boys in the mid-1970s as a bass player in live shows and as their manager, before returning to solely working with Chicago.