I agree with the others, front and rear would be better with something on the sides of car.
That being said, the Fox Body Mustang is a Modern Classic, and I would be proud to own a stock bodied 5.0 LX Notchback in good condition.
Personally, mine would not even have a spoiler on rear deck lid.
These Cars are 30, 35 years old and are genuine antiques, (over 25 years old).