Nice. So they really are as old as I think they are? That's pretty crazy, but I don't know whether it's really a bad thing or not, nor do I know much about Datsuns, I just remember that tire and it brought back memories. Enkei classic's are nice looking wheels. I'm a car person, my first custom wheels were lightweight Enkei's (17 lbs each).
The ones you're talking about are way nicer though-

Good luck.