Good Job Bill!
My dad got me a copy of this magazine. In it they do a 5spd swap on an SSP Coupe. They don't say what year it is or anything else about it. I got the photo here from Muscle Mustangs facebook page. In the article you can see the car is black, red interior, trunk pop is close to the lower left edge of the access panel, and the car has a red interior without the black on the dash.
It would be nice to find a way to contact them to learn more about it
Sad it's being modified...