If anyone's interested, here's the answer I got from Steve Miller:
"Take a look at this website. http://www.rootsweb.com/~inputnam/http://www.rootsweb.com/~inputnam/ On the left hand side are several listings. Click on the one marked maps. When you get to the next link click on the selection on the far left or the one on the far right and either of these will give you a good map of where Marion Township is located. It has always been Marion Township and still is. Good luck Steve Miller"