Here's a link I posted in MTR a while back, but apparently nobody reads that anymore...
Anyway, this is from an 8mm movie my dad took at the ribbon-cutting ceremony for I-75 in Rudyard, Michigan in the fall of 1963. Enjoy!
http://youtu.be/rEour-qotm0
That video is in impressive condition. Also impressive is how little the area has changed since the completion of I-75.