My car was built in LA but sold new in Las Cruces, New Mexico. I am trying to put it back like it originally was, except I don't have the original tag. The engine is a 383 (it's an R/T), and the reason I asked the question was I'm almost sure the car came with the three-nipple breather, as it has the five-nipple vent manifold in the back, and the four-nipple gas tank. So I figured it was an ECS car, and thought all ECS cars were California only.