An hour-long conversation between Bob Mould and Ryan Adams to me is like two super heroes teaming up for a summer blockbuster — something too epic to fathom. Mould was one of my super heroes of the ’80s, fronting the iconic underground band Husker Du. His post-Husker career has been steady and impressive. I first became aware of Adams in 1997, when he was in his early 20s, kind of a Western snap-shirt version of Kurt Cobain, a talented mess leading the alt-country outfit Whiskeytown. He’s gone on to greater fame, though much of his solo material bores me. But the two are apparently good friends and have great chemistry, and the NPR podcast conversation was heavy on writing, recording and gear, with sidebars on zombies, churches, hair metal and cereal. I could have listened for another hour.