When Edith mentions President Ford, Archie says he's voting for Reagan ("Reegan"). Ronald Reagan almost won the 1976 Republican presidential nomination.
Mike says that he owes Archie $2,600 for the five years he lived with the Bunkers (for which Archie replies that Mike had spilled more than that on his shirt). In 1976, when this episode first aired, the buying power of $2600 had the same buying power that $11,893.29 has in October 2020. Archie says that Mike owes him $3840, for the same reason, which had the buying power that $17,565.47 has in October 2010.
This was the second time in Season 6 that Archie trashed the kitchen. The first was in "Alone at Last" when Edith got mad at him and went to the Stivics' unheated house.