Two Sane Nuts (1974)

Two adventurers. Jim and Jeff, find just the man they need to finance a wild excurtion: Giovanni, the son of a millionnaire, who believes and is actually obsessed with the so-called treasure of the Brazil's Amazons. Raphael will be their guide. But, as soon as the small party enters the jungle, they are captured by the Amazons, and subjected to all their wishes...