My 280Z was a 1975 also, a very early 1975. It was recalled once for a fuel injection problem. I had to modify the car to kill off the "feature" that prevented the engine from dropping back towards idle properly while shifting. I had continual problems with the clutch / transmission (as previously noted). About once a month a wheel cover would go flying off into the weeds when I was going around a corner (I usually could find them). When the wheel covers weren't flying off, they "ticked." After the car was out of warranty it developed a stalling problem. The dealer tried to charge me for a fuel pump until I expalined to them I had already verified it wasn't the fuel pump...then they mysteriously figured out it was a loose connection under the dash. After three months in Michigan the car started rusting around the rear fenders. If you let the fuel level drop below about
1/4 tank the car would miss going around curves (apparently it would pick up air). The seat material was not durable. The power antenna had to be replaced. After I sold the car to a friend, he had the exhaust system collaspe internally (killed the power / mileage). I never had a problem with my actual fuel tank, although I heard later models with plastic fuel tanks did have problems.Compared to most cars I owned around the same era, it was not a model of reliability. It was also a horrible autocross car. It was significantly slower than the Ford Fairmont I replaced it with (which BTW, I ended up hating). Despite all this, I loved the 280Z. It was one of the best looking cars of the last 50 years and was a terrific bargin. It was the most comfortable Japanese car I ever owned. Within months of selling it and buying a "sensible" sedan to replace it, I wished I had kept the Z. Oh well..it was not the last time I made a bad car buying decision.
Ed