While you'll want to title it for the year of manufacture I expect, back then it wasn't unusual for a car to be titled for the year it was sold. Generally that would be the same but a car kept by a dealer might be noticeably different. My built in December 64 Tiger has a 1966 title and seems to have been a salesman's car for a year or so before sold to the buying public. Not normally done these days, the build model year stays with it now. Just an interesting bit of 1960s trivia..