William Penn Fyve aka William Penn & His Pals were a regular presence on the early Bay Area scene, opening for the likes of Jefferson Airplane, Paul Revere & the Raiders and Them. Their line–up included lead singer / organist Gregg Rolie, later of Santana / Journey. In 1966 they recorded their lone single, "Swami" / “Blow My Mind”, for the Thunderbird label.

The A-side (written by guitar player Mike Shapiro and famous for being included on “Pebbles-The Acid Gallery”) is early acid-punk with fuzzed-out raga guitars and hilarious lyrics about a guru. The flipside is an energetic garage-punk number with swirling Vox organ and a fuzz rave up á la Yardbirds.