I've been looking at Datsun Fairlady roadsters and Honda AN 600. I've seen some other cars I would like to learn more about, such as the Honda S800. My major concern is my height: I'm 6 feet 3 inches tall, and I want the car to be comfortable for me.
You couldn't have picked 3 worse cars for your height...
The Datsun Roadster can be made to work if you stick to a later "tall windshield" model and maybe replace the seats with something a bit shallower? There's plenty of legroom in a Roadster, just not much "headroom".
The N600 and S800 have almost no leg room at all. For anyone over 5'8" they are very
uncomfortable to drive.