I want a Kei van in Oregon

Hey all! In the past month or so I've started really looking into buying a kei van in Oregon and have heard a lot of mixed things about weather or not you can even make it happen. My brother happened to run into a kei van with plates and everything and talked to the owners who said that they got it in just fine and its totally legal. However when I look it up almost everything(including the DMV page for Oregon) say that its "not built for US roadways." On r/keitruck one guy was saying that you just have to go to a rural DMV and they will register it just fine. I would love some more information on this because I don't want to spend 4g on a van that I can't even drive around on my local streets. Please help!