Here's what makes it rare (based on a couple of assumptions from the OPs first post). With those options it is very likely a Dart GT with the rallye package AND the Dart Charger 273 (see the correct air cleaner). The rallye package consisted of the Formula S handling package AND disc brakes. Every one that I know that I have seen also had the 273 four barrel.
There is one 67 GT hardtop that I almost bought in 1982 that may have been the exception. It was a 273 two-barrel car, but it did have the tach (missing) and 14" wheel (mandatory with disc brakes) and was also a four speed car. The engine was seized, but the price was right ($200), but I really didn't have a place for non-running car.
Over the course of my playing with Darts since the late 1970s I have only seen two that were certain rallye Darts. This one that we parted out in 1981 (The 8-3/4 from this car wound up in LilCuda's 66 in late 1981) and a blue one that I would occasionally see in San Jose in 82-83, but could never find the owner.
