Hemmings did a nice piece on a very sharp looking 1973 Mustang 351-4V hardtop. A nice looking car, but with low 16s and 0-60 mph in 9 seconds, it was not 1968-72 quick.

Clean Mustang 351-4V

I wouldn't modify a well preserved car like this, just enjoy it as the original owner has done all these years, and accept it as the 1973 car that it is. I would NOT put a Coyote under the hood or Wilwood brakes on it.

Marc Cranswick never called the Firebird & Trans Am muscle cars, he called them sport compacts, because that was what they were called back in the day when GTOs were the muscle car.