Post a pic... I'd love to see the artwork.
That was one of my favorite John Wayne movies when I was a wee lad (for obvious reasons). And I found a new appreciation for it later in life when I started seriously getting into 70s movies. Bruce Dern was a fantastic actor... it's too bad he fell off the radar. There was great documentary about the 70s called 'A Decade Under the Influence' that I recommend any film fan check out. In one of his segments, Dern was reminiscing about 'The Cowboys' and said Wayne warned him about playing a villian (who shoots Wayne in the back nonetheless):
"America will hate you for this." Dern replied (with a smile) "Yeah, but they'll love me in Berkeley."
Classic stuff. The Italian poster 'I Cowboy' is also pretty cool.