Sweet Talker (1974)

A Mississippi crop-duster called Clay Teeter, married to a domineering preacher's daughter, runs off to Florida with his girlfriend Pearlene and becomes a phony revival preacher. He travels around in a 1929 biplane, conducts his revival meetings from an old tent with a choir and a rock group called 'Flying Gospel's Rock Revival', employs two hot 'sisters' to brandish the collection plates, and despite himself becomes something of an inspirational youth leader in the process.