Do you actually have that 280zx? Can you check if it is mounted BEHIND the front axle? Because if it is, I'm sure I can put it in. The wheelbase is the same, since Nissan almost exclusively changed the body and not the chassis.
If you want to do me a huge favor, you could measure it, too and take a picture
But I understand if that is too much asked for, so if you don't feel like it, don't worry.
Thanks anyway!!!