I think you're thinking of the Chisholm Trail.It does show I-35. When a kid, I think it was hwy 77 or 177 that was the only route to OKC from Ponca? Two lane road back then.
They may have been different back in the day, but US-77 is the one that generally follows the path of I-35 through OKC, Norman, Lex, and Purcell. 177 bypasses OKC to the east, going through Wellston, Tecumseh, and Asher.