Think I'm making this up? No way, here's Paul LeMat (Milner) at the Over the Hill Gang's car show a couple years ago http://justacarguy.blogspot.com/2006/11/milner-and-duece.html#links
Pics of it from the movie http://justacarguy.blogspot.com/2006/11/great-movie-american-graffitti-cars.html#links