I had/have a 1970 1000 2 door sedan.
It said 1970 on the Victorian rego label and on the build plate,if I remember right.

By the way, I paid $50 for it, full of rust, not a straight panel and NO brakes, to use as a paddock thrasher. I had fun with it for about a year, and it had such upgrades as chaining the engine to the firewall to stop it going through the radiator landing after jumping the dam on the property, and staggered tyre heights to help handling on the speedway we set out.....
It was great until coming into a sinkhole on the speedway, sideways in 3rd, the front supension lever arm (the one with the damper on it that goes to the front of the frame) ripped off its Tek-screwed on front mount. wasn't worth fixing. Its on a farm with a whole heap of other broken Datsuns somewhere out near Smythesdale/Scarsdale (near Ballarat, Victoria)....

cheers,
floody