The 69 car isn't a supermodified. Different class of car entirely, which is why it wasn't "Shampine green". There are a lot of smaller tracks here in upstate NY (including dirt), but Oswego's 5/8-mile paved oval is well known as the "Home of the Supermodifieds", and that was Jim's specialty. A truly great driver, we still miss him.
Nope, I never heard him call that car (or any other) the "green machine", and neither did any of his long-time friends I have spoken with - but obviously someone came up with that name, and it ended up on the car, which Jimmy would have had to appprove. So it's certainly a legitimate part of identifying the car, and thanks for posting it.