jn is right JoMal, Lucas wasn't a pusher for the Mafia. Frank Lucas started as a two bit thug working for Ellsworth "Bumpy" Johnson (himself an enforcer for the Genovese Crime Family). After the death of Bumpy, Lucas broke out on his own and found connections outside the United States to get high quality Heroine cheaper than he would through the Syndicate and thusly could under-sell them. This of course disrupted "the order of things" which necessitated incessant negotiations and pay-offs with the Sicilian and Mexican Mobsters whose territory ran through his, Harlem. At the time of his arrest in 1975, Lucas was worth $52 million--quite a bit more than your average Mafia underboss stooge.
Now its true it was fashionable for the media to concoct the story of a sophisticated "Black Mafia" (Bumpy, Lucas, Barnes, Guy Fisher, etc.) directly in opposition to the National Crime Syndicate and just as influential and powerful. This was NOT true. The most successful Black crime lords were the ones who cooperated WITH the Syndicate not the ones who FOUGHT against it.