Christopher St. John appears here 11 months after being in "Shaft".
Paula Kelly appears here 5 months before being in "Trouble Man".
JI-Tu Cumbria appears here almost 3 months before being in "Blacula".
Christopher St. John has a line in this film that loosely references one of his lines from SHAFT (1971). In 'SHAFT', he says: "I can do any damn thing I want". In 'Top of the Heap, he says: "Bobby, I can do any God Damn thing I want".