I watched this as a young lad at my friend's church once. Don't really remember any of it aside from the poster, and now that I'm an atheist I don't plan on reminiscing too much about it. It's just funny that it still sticks in my mind.
It does feature the excellent John Callum however, who later achieved fame in the tv series Northern Exposure.
http://www.imdb.com/title/tt0086146/