Welcome to the Q&A Forum

If your posts are getting good traffic and rank well already, I recommend writing a new post and putting a link at the top of the old post saying that you have created an updated article. You can never be sure what the "magic sauce" was that made Google like your original article.

For Google News entry this strategy would simply not work. I also wonder if a single page would make you a subject authority. The bots may sense that you are trying to game them. with all those 301's.