If you're gonna do an anally correct nut and bolt high-dollar show car resto, don't change the color.

If you just want a nice driver/local show car, I doubt a well-done color change, especially from a less-desirable color to a more-desirable color, would hurt the value.

That said, I'd leave this one white with a green interior, for two reasons: 1) the car is so original, and 2) blue-with-a-black interior has been done to death.