1926 map through York, PA This set only goes to Pittsburg
http://www.lincolnhighwayassoc.org/map/The Association's official map (using Google Maps)
There's an important difference between Route 66 and the Lincoln Hwy. US66 was a designated federal highway, that was gradually replaced by interstates. Lincoln Hwy was the result of promotion, by individuals, associations, and locals businesses. It wasn't a federally designated route, not even a state designation. As such the route evolved as local and state roads were developed or rerouted.
But the two are similar in the sense that a lot of what you see (or used to see) are the businesses and tourist attractions created to capitalize on the road's fame.