Based on the liner notes in the drum parts, the music was heavily influenced by “Shaft”. It holds up great. A Broadway revival has been attempted, but so far the show only had a 4-week run at the NY City Center (starring Ashanti).
The film version, directed by Sidney Lumet, wasn’t well-reviewed, despite Diana Ross, Michael Jackson, Richard Pryor, and director Sidney Lumet. Which is too bad, because the trailer looks great:
UPDATE: The previous video of the trailer was taken down from YouTube, here instead is the oddly static “Ease on Down the Road” scene.