Thunder and Lightning

This hilarious, high-octane comedy stars David Carradine as Harley Thomas, a Florida moonshiner who prods Ralph Junior, the father of his girlfriend Nancy Sue (Kate Jackson), into a rivalry to see who can manufacture the most moonshine. Once Ralph Junior welcomes the challenge, the two men struggle to get the brew from home stills to their dehydrated customers before the police can seize the liquor. The real challenge, though, comes from the fact that Ralph Junior hears up the local mob! (official distributor synopsis)