When Curb assigned soundtrack duties for biker film "The Wild Angels" to Allan and the Arrows, it would prove a breakthrough success. The song from the film's opening, “Blues' Theme”, an aggressive, repetitive and very catchy instrumental showcasing Allan's new fuzz (heavily distorted) guitar sound became their biggest hit (it was also one of the first songs Eddie Van Halen learned to play on brother Alex's guitar). The song stayed on the Billboard charts for 17 weeks (it peaked at #37) (#36 in Canada). The single, backed with “Bongo Party”, and the soundtrack album both sold well. Rumors have stated that the melody in "Blues' Theme" was stolen from Louie Shelton's guitar lick in "Last Train to Clarksville", but "Last Train to Clarksville" was recorded on July 25, 1966, while "The Wild Angels" debuted in the theaters on July 20, 1966.