Here's the trailer for 1972's Trouble Man, which was recently released on DVD by Fox - a California pastiche of Shaft. Says the narrator: "He carries two guns. One to stop trouble and one to make trouble!" You have to want to love a movie where Mr. Carlson from WKRP plays a slumlord and the dad from The Waltons is a sleazy hustler. All this and a Marvin Gaye soundtrack too!
This is the exactly the kind of movie that would have been playing at the Rio, the last of the Yonge Street grindhouses - the home of '4 Big Hits' for 4 dollars. Movies from 9 am until 5 am. I saw a couple of blaxploitation films there - Shaft's Big Score! and Truck Turner with Isaac Hayes.