Keep it stock, or make it your own?

I have 2 (two) cars. 1 is a 75 Dart S/E 4 door. It stands on it's own. That car looks like it rolled out of the showroom. It's a survivor car and I'm not doing anything with it other than maintaining it.
The second is a 74 Duster that I bought from a member here. It's a /6 car, and heavily modified. Last I checked, my name is on the title and until that changes, I'll do whatever I want to it, when I want. If that means I paint polka dots all over, then that's what I'll do. If you don't like it, your head is attached to your neck and it'll turn. I'm neither asking for, or care about your opinion.
When I bought the car from said member, he had made modifications. I wasn't a fan of all of them, but that was something I was able to overcome. I modified his modifications.
Oh and Mr. Idontknowyourasz, I don't care that you think I should drop a 440 in it. It has a /6 in there for a reason, and I don't have to explain that reason to anyone. That goes for both cars.