I remember watching it as a kid in the 1980s, but I’m pretty sure the movie is from the 70s. I remember almost nothing about it except the good guy and the villain have a boxing match at the end of it. Both participants put something heavy in one of their hands. The good guy put a roll of coins in his hand and the bad guy put some bullets in his. During the fight, they hit one another simultaneously and they both sink to their knees.
Good Guy: What did you put in your hand?
Bad Guy: Bullets. What did you put in your hand?
Good Guy: Your money!
I understand this is incredibly vague, but I think you’re up for it.