Thinking about selling..need advice

FABO, I need some advice although I think I already made up my mind. I've owned my 69 Dart for 16 years, it is my 1st car. Theres nothing wrong with it, it runs and drives good. It has a decent 360/727 with disc brakes and at least I think looks decent for a weekend car. The problem is that I find myself wanting things like AC and overdrive and I just dont want to spend the time cutting and fabricating to make it work or the money. If I did, all I would think of is how I couldve used that money on a down payment on a newer challenger. When I drive it I enjoy it, I just think that maybe I should move onto something else that will give me everything I want. I built this car with my dad and feel like I would be giving away all the memories by selling it.