George didn't open his first store until 1971 (according to All in the Family: "My Aching Back"), three years after King's assassination. Jefferson Cleaners was started with money George was been awarded in a settlement following a motor vehicle accident (according to The Jeffersons: "Meet the Press"), not a bank loan. In addition, in this episode, George had been working in someone else's cleaning store, but on All in the Family, Archie stated that George had been the head janitor at the Hampstead Apartments in Queens before starting his cleaning business (which was apparently how the Bunkers and Stivics got to know Lionel before the Jeffersons moved to Queens).
This is the only 6th-season episode in which Marla Gibbs does not appear.