Go for Broke (1968)

In the wild frontier of Texas and Mexico, four little boxes heavy with gold bars, valued at US$ 200,000, were robbed from the El Paso bank. The American Native Copper Face says he knows where it is hidden, and the Mexican Carranza and his gang are set to take it. A pair of Texan adventurers--Johnny, young cards player and trickster, and The Owl, a tried cowboy--cross Carranza's path to the treasure. The gold cache changes hands often, and friendships do not last long.