Nancy Wilson (left) and Ann Wilson of Heart perform at a previous stop on the “Love Alive” tour. Courtesy: Kimberly Adamis/Heart. CONCORD, CALIF. — At various points during their 90 minutes or so onstage Friday night at the Concord Pavilion, the Wilson sisters of Heart referred to how long…

1977 was a good year. Star Wars came out, Fleetwood Mac’s Rumours came out, Voyager 1 and 2 launched, Harvey Milk was elected. I mean, yeah, disco still existed and there was that whole Son of Sam (serial killer) thing I guess—but, Star Wars! It was a pretty good year…