Everybody has a favorite incarnation of Heart — the acoustic hippie troubadour sisters of “Crazy on You”? The arena-rock warriors of “Barracuda”? The bustier-clad glitter queens of “Nothin’ at All”? For some fans, Heart’s finest moment might be right now, as the Wilson sisters keep making good music years after their classic-rock peers have faded away. On Red Velvet Car, producer Ben Mink helps them craft their folkiest tunes since Dog and Butterfly. Ann and Nancy stay on the mellow side in reflective ballads such as “There You Go.” But in “WTF” and the hometown Seattle tribute “Queen City,” these barracudas still draw buckets of blood.