With valves-r/b F0TZ 6049-E & (2) N605800-S100 When F0TZ 6049-E is used to service 1986/87, it is necessary to use later design valve covers E9TZ 6582-F and E9TZ 6582-H
Without valves-r/b F0TZ 6049-D & (2) N605800-S100 When F0TZ 6049-D is used to service 1986/887 it is necessary to use later design valve covers E9TZ 6582-F and E9TZ 6582-H