Andrew I'm just throwing spit-balls here but what about locating the High School he attended. Knowing his class year might help firm up his birth year. If you have an Ancestry.com subscription year book photos going back 100 years or more are coming through regardless if the person is alive or dead. A peak at his high school class couldn't hurt your research. You may be able to find some old pals of his in the process who can tell you some stories. As you know, and like most everything else, Classmates.com is subscription based but it's an excellent way to approacn old classmates or make a general request for information about one of their deceased classmates. If that's not a feasable approach at this time I'll bet the H.S. he attended has copies of their old year books in their library archives or (the books may have been digitized). In any regard good look with this.