Las viboras cambian de piel (1974)

An outlaw and a scorned husband both team up to track down and kill the man that wronged them. Along the way, the two men meet a hired gun that loves money just as much as he loves the company of women, so the two men decide to hire him in order to help them on their mission. However, things become complicated when the man they all seek to kill has risen to become a wealthy sheriff with a small army of gunmen at his disposal.