When Tom Petty reassembled his first, pre-Heartbreakers band in 2007, it may have seemed like a novelty. Now, with a second album, Mudcrutch feel like a steady moonlighting gig. This record is more of a band effort than the decades-delayed debut – all of the members get writing credits, and all get a shot at a lead vocal. The songs tend to lean toward punchy Southern rock. But there are surprise twists too, like guitarist Tom Leadon’s “The Other Side of the Mountain,” a bluegrass benediction cut with psych-rock guitar charge.