Welcome and nice car, Dadson. I also have a 9/71 build date car, HLS30-46372 (original owner), and it, too, has the vertical defroster grid found on the '71 models. I though that mine was a rare bird in that Nissan was likely using up a few old parts in the early '72 models. But your VIN looks to be about 1,000 units after mine so it seems there were more than just a few leftovers.
My car came off a rotisserie earlier this year and is now undergoing restomod to become a 5-speed, triple Weber 45 carbs, 3.2 L stroker, 3.90 R200 diff beast (with Vintage Air A/C) and I'm hoping to get it back on the street this coming spring - depending on how cold the Ohio winter is going to be (unheated outbuilding).
First bit of advice: take a LOT of pix before you begin removing bits and label, label, label.