I own a 83 280zx.... big thing that i noticed is that there quite reliable i put a beating on my motor and it starts right up everymorning and its commin up on 190,xxx miles.... but things that tend to go from what ive seen is that bolts tend to snap i call them butter bolts, hoses crack, if your not lucky your z will tend to run really hot they then to have cooling problems from what other zx drivers told me due to the fact that the ac condencer is in front of the radiator, the oil pressure gadge is not very acurate, need n e parts go to MSA, Ebay would be a cheap place to get a ECU, but how much he want for the car? I wouldnt pay more then 500 since u dont know 100% if the car actully works....