Towards the end, the school bus that comes to pick up Scott and Adrianna is a Navistar 3800 model which was not introduced until 1989. In fact, Navistar wasn't even a company name until 1986. In the 1970's, that company would have been known as International Harvester.
The Falklands War happened in 1982 (after the setting of the movie in the late '70s) and was fought between Great Britain and Argentina. It did not involve any American troops.