Wow, lots of incredible combinations. Here's my add - March 1976, WSU Coliseum War (Cisco Kid, Lowrider) is the headliner. I was working as part of the local crew. The opening act is a band from Seattle with two female singers who'd just released their first album.
Their hit was 'Dreamboat Annie' and they rocked the house. Their name was Heart. They started their first National tour 2 weeks later. I was offered the job as stage manager, but i was halfway through my senior year of College, and said no. Bur 2 weeks after school ended, I started work with Stanal Sound, and two weeks later, I was on tour with John Denver.