Sorry for the late response...

That font & color belongs to the same period as these signs:


http://www.flickr.com/photos/bossmustang/sets/72157622945726489/?page=2

So, yeah, anywhere from the late 60s to late 80s. But I'd guess 80s, just because I can vaguely remember banners like that at my hometown Ford dealership.

Jackrabbit, old map and matchbook collector and owner of TimeAndSeasons.com