The 78 Gremlin's dash is different from the rest of the Gremlin's. It has the same dash as the Concords. I remember buying a radio for my 77 and having to put it in my 78 because it wouldn't fit. I have one of the cheap radio's in my 78 and I don't believe it is very deep. They come in those plastic packages so you could measure them easy enough. I got an old FM converter I am going to put in mine so I can keep the original radio. I would love to have an original AM-FM to put in it though. [Non-text portions of this message have been removed]