You love the car and if you sell it you will be kicking yourself for every minute of the rest of your life.
There are a few cars and motorcycles that I sold decades ago and the loss still grates on me whenever they come to mind. Like now.
Back in the mid 70s the father of a friend of mine owned the local cab company and had about a dozen Checkers. He had a hired lady to handle dispatch and he personally took care of all maintenance on them. He often stated those cars were like tanks and almost all service work he did was just normal routine maintenance and wear/tear parts.
Both company owner and all of the Checkers are long gone now; replaced by Crown Vics in some of the most nauseating colors that could be had. I have to think they’re repainted ex-cop cars.