After a long search I was finally able to find a NP 205 indicator plate at the junk yards. It came from a 77 GMC Jimmy with a manual. Here is a pic of what one looks like below. This was a hard part to find. 76 and 77 for sure and maybe into the 1980 model.
Here is one in an old article.
http://www.73-87.com/7387info/articles/hickey_blazer_6.jpg
Here is one in an old article.
http://www.73-87.com/7387info/articles/hickey_blazer_6.jpg
