Whereas most actors would fight for more lines of dialogue, Clint Eastwood fought to cut out many of his lines. He thought the character on the page was too talkative and wanted to play up the mystery and enigma of the character.
Akira Kurosawa successfully sued the makers of A Fistful of Dollars for plagerising his 1961 film Yojimbo.
The Man With No Name only wears a poncho because Sergio Leone wanted to make Clint Eastwood look more like muscle man Steve Reeves.
Clint Eastwood's famous squint in The Man With No Name trilogy only came about because the cigars that he had to smoke irritated his throat.