The only US model 4000's that had a 5cyclinder were the 1980-1981 and all 4kQ's. Any other year us 4000 had four cyclinders. These four cyclinder engine came in either 1.6, 1.7, 1.8 liter variaties. The best one to get would be a 1986 or 1987 as it had a high compression 1.8 with knock sensor. Scott