Hi -
I've owned my 1969 2000 for almost 10 years. A nice little car. You can
get parts and information from:
http://www.datsunparts.com/index.html or
http://www.datsunroadster.com/
The 2000s had a 4 cylinder overhead cam engine. The 1600s and 1500s had
standard pushrod engines. The 2000s had more pep, but had issues with the timing chain and oil pressure. The 1600s are bullet proof and are still fairly peppy.
The 1970 was the last model year for the 2000. It has square corner lights. The 1969 and 1968 model years had tear-shaped corner lights. If you can find a 67 1/2 2000 buy it. They are very rare, and have a low detachable windshield. I think their side triangle windows open, also.
Anyway, parts are a bit harder to get and a bit more expensive. If you're on the east coast there is a Roadster get together in Watkins Glen every year. Lots of events on the West Coast, too. Good luck should you choose to get one.
Stephen in NJ