I am sitting here watching a movie with Glenn Ford and David Carradine filmed in 1975 that takes place in the 1930's. Glenn Ford is a preacher and David Carradine is an escaped convict. It's not in the data base and is way too much trouble to put it in!!!
From your description, it's likely from the short-lived TV series "The Family Holvak." According to the cast list, David Carradine appears in the two-part pilot. The episodes were titled "The Long Way Home."