I'll put in my two cents for what its worth. If your car is rare and has historical value tied into its rarity then the original color is the only way to go. Then this brings rarity into the equation as well as historically significant, what are meant by these... well not to offend any one but a 1970 barracuda convertible with a 383 4 barrel may be rare but it has no historical value... someone old, or someone lame ordered it, bought it and kept it all original because it was never more then just transportation. Now anything multicarbed, or has a big wing and a pointy nose should be painted the factory color. Any car model that could only be had with a performance engine should have the same treatment.
And if your trying to relive old memories... go for it and do what you want... if you have a good foundation but its a color that you dislike don't go out and buy a P.O.S just because its a cool color and have to replace every panel...just remember after it painted the wrong color and when you do get rid of it there maybe a few people who disagree with what you did..tell them its just a Challenger, or just a Coronet!!!

oh ya... never, never, never paint the bottom of the car body color and call it restored! Its now a custom!