Ann and Nancy Wilson have come a long way since Dreamboat Annie came out on Mushroom Records in 1976. The pair’s band has undergone numerous lineup changes, the sisters have lost and gained weight (notably, Nancy added 200 pounds of Cameron Crowe), and there has been a Robin Zander collaboration. A better man than I am once said there are two kinds of people: those who dig “Magic Man” and those who dig “These Dreams” (or maybe it was “Roundabout” and “Owner of a Lonely Heart”). The point is that Heart, in the course of its 32 years, has led attacks in all chambers of the music-loving population. With the launch of a new album and tour, both of which seem to hearken back to the band’s more rocking ’70s without rejecting its popped-up ’80s, Heart is pumping blood once again.