In Blind Faith - February 6, 1964 (1989) Sam at first claimed he couldn't play the piano, but later established that he played concerts in Carnegie Hall having had a teacher. Here and in Pool Hall Blues - September 4, 1954 (1990), he shows he recovered his swiss-cheesed memory.
In the episode the date is set in 1985. The car that they are driving is a Chrysler Lebaron with a body style that started in 1987.
After the engine fell on Angelo, yellow markings are seen on the floor of the aircraft hangar that were used for actor's cues/positioning.