Can 280zx or 300ZX seats be placed in a 75 280Z w/o any mods? Just a thought that crossed my mine cuz I 'm thinking of redoing my seats....

given enough time, you can make anything fit. I don't think it's a direct bolt in. I've heard very good things about Miata seats. Would be kinda cool if you can get the ones with the speakers in the headrest.