I'm a new Z owner and I need some info. I was told the motor was from a 72 280. The 280 has to be 75 and above. I have the block #'s and they ARE L28, but I'm not able to verify the year it was made ( I called Nissan USA). I want to do a complete re-build with good parts so I don't have to go into the motor for while.I've been told all 280's after 75 were fuel injected.......I don't believe it. The one I have is carb'd. I'd appriciate any info..