(I'm sure MrAngry got it correct, so I won't answer.) Hint: The car shown up there isn't branded as an Grumman.
Correct! It is a facelifted Zastava Florida or, to be precise, Florida In. But, can someone guess which specific prototype is it?
No, it's more recent, and biggest change is engine. It actually has diesel engine from a major car producer.
Now, I'm gonna repost my image: Take an note that I did brush off the grille, so you'll have to guess from the body style, headlights, and bumper. (Google identified it as a headlamp, so that trick won't work.)