When Eddie Trojan and Chanel-6 are riding in Eddie's car the song 'Don't Fear The Reaper' by Blue Oyster Cult is playing. The date is July 4, 1976. 'Don't Fear The Reaper' was not recorded until August 1976, and it became a billboard hit in November 1976.
Chris and Tommy have numerous patches sewn onto their jeans. One of the boys has a patch on his leg depicting Gene Simmons from his Kiss solo album. This film was set during the Bicentennial - 1976. The Kiss solo albums were released on September 18, 1978.