Have you considered the Old Lincoln Highway?

The Ohio Lincoln Highway Association has detailed section maps -
http://www.lincolnhighwayoh.com/preface.html

The Indiana Lincoln Highway Association doesn't have as good of a website -
http://www.indianalincolnhighway.com/
Map - http://lincolnhighway.jameslin.name/by_state/in.html
But here is info from the Ohio website
http://www.lincolnhighwayoh.com/1924_indiana_lh.html
http://www.lincolnhighwayoh.com/1928_indiana_lh.html