YES! Looks like a 66-67 fastback with the 289 hypo and a 3-speed. Badass ride!
HS friend had that (66) model convertible. It had been her uncle’s!
Fun ride .... fun memories.
It’s a 65 based on the grill (vertical bar is missing in the corral).
https://cars.bonhams.com/auction/24120/lot/204/1964-ford-mustang-fastback-coupe-chassis-no-5f09a323077/