Tom Jones presented his two-hour powerhouse-of-a-show at Montclair’s Wellmont Theatre to a slightly ‘mature’ crowd…who were rabid to hear the Welsh singer someplace other than Vegas. Not only did we get treated to newer numbers like the stark guitar-and-drums only opener of John Lee Hooker’s “Burning Hell,†and an equally gospel-ly “Run On,†but when Mr. Jones and his cracker-jack 8 piece band of guys less than half his age rolled through well-known numbers like “Mama Told Me (Not to Come),” “What’s New Pussycat?†and “Delilah,” we got slowed-down, revamped versions you could tell Jones and band were having the time of their life putting new life into.