I also vote for the 280zx, they often have soft frame rails. They just didn't build them strong enough at that point to allow frequent lifting with such a heavy front end. They really should have been strengthened from the factory. Overall the car does not look "that bad" but again, I am from Canada too.. Unless you do something to strengthen the frame soon, the number of years left with the car are limited. You could just avoid anything other than drive on hoists, and enjoy the car for a few more years. However I'd be willing to bet only a couple more years and the 300zx will start showing it's age heavy too. The only thing I like better about the 300zx is the superior ecu/maf system. Other than that it is one of the most aweful cars in the world to work on.. Granted the Vg30 is a excellent engine. Try and change a alternator, starter or head temp sensor and you'll know what I'm talking about. On the the flipside, a 280zx is almost a joke how easy it is to perform normally difficult tasks. I don't mean to offend any z31 owners out there, it is a very well built car (thank goodness) cuz you sure don't wanna work on it. I like them just fine as long as they are someone else's and not mine.. LOL