Apparently a one-off DIY label, but definitely a product of custom recording concern Tank Records (q.v.). A four-track EP by Rock 'n' Roll band Shazam featuring 'Diggin' The Bugie', 'Red Cadillac', 'Ubani Stomp' (sic) and 'Blue Moon Of Kentucky' seems to have been Bop Street's only release. Its catalogue number, BSS-141, was borrowed from the main Tank series. There's no date on the label, but the number suggests 1976 or 1977. Thanks to Nicholas Hough for bringing the label to my attention and for supplying the scan.
Copyright 2013 Robert Lyons.