273 CI
I get a charge out of Barrett Jackson or some of the Mopar magazines for that matter. It's easy to come up with a 1 of 1 car if you don't have any proof to back it up. A 65 Coronet is a 55 year old car and any time in those 55 years the 4 barrel and goodies could have been bolted on. Unless it shows on the vin, fender tag, and build sheet, I have a hard time believing it happened.