The Billy Goat is not a Chevelle, but a GTO, pretty close. It has 245 / 35 / 19 front and 345 / 25 / 20 rear. The rear tires are a full 1 1/2 shorter then the tire your looking at.
It didn't need to be a Chevelle. I should have pointed that out. I wanted to see the sidewall on that tire. Thank you for the pic. Nice car by the way. How does that Goat ride with such a short sidewall?