4 for Texas (Four for Texas)

Zacharias Thomas (Frank Sinatra) and Joe Jarrett (Dean Martin) are a pair of rival mountebanks who spend most of the film battling over who will control the gambling and wenching in 1870 Galveston. Though they'd as soon cut each other's throats than cooperate, Zack and Joe are forced to unite against a pair of common enemies: crooked banker Harvey Burden (played by Victor Buono) and cold-blooded outlaw/hired-gun Matson (Charles Bronson). The heroes also battle over the affections of well-endowed heroines Elya Carlson (Anita Ekberg) and Maxine Richter (Ursula Andress), both of whom are sharp-witted businesswomen who match Zack and Joe scam for scam.