Chevy would run out the old models before starting the new models. I had a ’73 that was titled as a ’73 but had the ’72 body style, which was a big difference. It’s a ’53 in the eyes of the law, so I’d call it a ’53. Your ’53 is just a little more rare than the rest of ours as there probably were not that many that crossed over into the new model year. …….