I would think that a highly optioned 455 HO would be a rarer car. The resale value , one would assume, would be best as a numbers car. Original paint, etc.
That being said, your color, is not one of the most desirable. As my color is not the most desireable. When I was showing mine, a red, or black, or blue car would usually beat me, even if it was not done as nicely. (popular vote shows) Non-original paint cars with Popular colors sell faster than cars like ours. All that being said, if you plan to keep it, drive it, or sell it, paint it what ever popular color you want. If you want to restore it, paint it original. Just my honest opinion.