Boss Nigger (1975)

Starring:

• Fred Williamson
• D'Urville Martin
• William Smith
• R.G. Armstrong
• Carmen Hayward
• Don 'Red' Barry
• Barbara Leigh

Storyline
Boss (Fred Williamson), has "decided to hunt white folks for a change," by becoming a bounty hunter to click the hammer on fugitive outlaws. He and his comic sidekick Amos (D'Urville Martin) ride into the town of San Miguel, find it has no sheriff, and takes the job himself, much to the displeasure of the racial epithet-hurling townsfolk who must pay $20 each time they use the "n-word." Those $20 fines add up faster than a Texas tornado, as does the posterior kicking of those who try to keep our heroes from instituting "black man's law in white man's town."

Black Belt Jones (1974)

Starring:

• Jim Kelly
• Gloria Hendry 
• Scatman Crothers
• Eric Laneuville
• Alan Weeks
• Andre Philippe
• Vincent Barbi
• Mel Novak

Storyline
The Mafia's Don learns that the City is planning a new civic center, and is buying the land where it will be, to make easy money when the city council will buy it. The one piece the Don doesn't have yet, is the old African-American karate school owned by Papa Byrd. Big Tuna, the Mafia Don's right hand man, goes to Pinky, their representative in that area and they tell him that he owes them $250,000 but instead of paying, they want him to get Papa Byrd's school. Pinky tries to muscle the karate master into handing out the property title, but he throws him out. A teacher calls Black Belt Jones, a friend of Papa Byrd, to talk to him about this, but before he does Pinky and his thugs accidentally kills Papa Byrd in a second visit. Before dying in friends' arms, Byrd says that the school belongs to Sydney - whom nobody knows. Black Belt Jones knows that Sydney is Byrd's daughter, whom he hasn't seen since she was a child. Black Belt asks a friend of his who works for the Government, to ... 

Link to soundtrack review
Dennis Coffey - Black Belt Jones (1974)