by Bill DahlWhen Lonnie Mack sings the blues, country strains are sure to infiltrate. Conversely, if he digs into a humping rockabilly groove, strong signs of deep-down blues influence are bound to invade. Par for the course for any musician who cites both Bobby Bland and George Jones as pervasive influences.Fact is, Lonnie Macks lightning-fast, vibrato-enriched, whammy bar-hammered guitar style has influenced many a picker too — including Stevie Ray Vaughan, who idolized Macks early singles for Fraternity and later co-produced and played on Macks 1985 comeback LP for Alligator, Strike like Lightning.Growing up in rural Indiana not far from Cincinnati, Lonnie McIntosh was exposed to a heady combination of R&B and hillbilly. In 1958, he bought the seventh Gibson Flying V guitar ever manufactured and played the roadhouse circuit around Indiana, Ohio, and Kentucky. Mack has steadfastly cited another local legend, guitarist Robert Ward, a...