Mike, I have a 64 T-Bird and I'm pretty sure Ford did the same thing in 63 as in 64. So You have a few things going on. First is the bushing in the engine compartment. This bushing holds the selector tight with the steering column. I would talked to Doug from Pat Wilson Thunderbird. He can explain it better with direction to replace it witout tearing out your entire steering column. Now second will be your steering selector. Years of driving has worn out your selector and shift
detent plate. You really should replace all for safety issues. Because the next issue will be the car will not start. The looser it gets the neutral switch will not stay connected. Any questions you are more then welcome to call me. Ford Carlisle Nationals is this weekend. There will be lots of people who can answer your questions if you live close to Pennsylvania. Thanks and good luck, Dan (forest hill, Md) ************