“Actually, I think the original “muscle car” was either the Chevy Bel Air SS or Impala SS 409ci or the Ford Galaxie 390ci. “
I think the first car intended to be a muscle car was the GTO. The history channel did something on muscle cars that was pretty good, they picked the GTO because it was the first car to be full sized, but lightened, with a big motor.
You could debate the point though, history channel isn’t the ultimate authority.
They’re right on this one!!