Mac reminds retired boxer Freddie O'Neale that his last bout was with "that kid Clay," a reference to Cassius Clay, the boxing champ who joined the Nation of Islam in 1964 and changed his name to Muhammad Ali.
The outside shot of the hotel where Freddie O'Neal is staying is the same building as Beth Davenport's apartment in The Rockford Files (1974).
The first tune played at the wake is "Whiskey in the Jar".
The plane Mac and Sally fly to Palm Springs in is a 1968 BEECH CRAFT - BEECH-95, Aircraft Registration (N70MB). Still in service.
The plane chasing Mac and Sally is a 1970 BEECH CRAFT A36, Aircraft Registration (N4059A).