Those lucky few Aussie greasers who saw Bon Scott’s first ever performance with AC/DC in September 1974 witnessed a rock’n’roll rebirth, its nerves comprehensively drowned, anaesthetised and powdered. “Bon downed about two bottles of bourbon with dope, coke, speed, and said ‘Right, I’m ready,’” guitarist Angus Young was quoted in music journalist Clinton Walker’s biography of Scott, Highway to Hell, …