I agree with RoyBoy on the artistic license taken by the sculptors. The grill looks like a 65-66 while the sides look 67. The tail light panel would solve the issue, though.
Not to pick nits (OK, I am) but the whole terminology of cars has changed over the years. I look at the car as a hardtop, not a coupe. That was to distinguish it from a convertible. In (very) old school terms, a coupe does not have a back seat, while a sedan does, no matter how many doors it has. Yeah, recently any car with two doors is called a coupe while a four door is a sedan. But the word "sedan" has either a stogy connotation, or one of luxury, while "coupe" sounds more sporty. However, here's MY version of a coupe:
While here's a sedan (two door, or as FoMoCo described it "Tudor");
By the way, the sedan is mine, in my driveway.
OK, OK, it's nit picking, but maybe I'm stuck in the past.
All in all, though, the Mustang is a nice vehicle for our layouts. I'll be looking for one.... or two.. Now to find a decent 37 Ford...