that's when Nissan started using fuel injection. It's a simple straight 6, 2.8 liter that can be tweeked for alot of power. In 1979 they started using turbo chargers which is even more fun. I have an 83 ( last year for 280's ) and it runs like a banshee.
-Abel
1994 Red 300ZX NA Convertible 1983 Red 280ZX Turbo Coupe