I can so relate to your decision. When my wife & I first saw my 73 'Mist Green' Barracuda with white top, stripes & interior we both went 'yuck' but it wasn't anytime at all after buying it and getting positive reaction after positive reaction to confirm what I was already beginning to think myself which was 'what a cool original color!'. I kind of think green cars grow on you, maybe like mold, and no longer think triple black would look better which was my original plan. If I had your car I'd restore it back to the way it came and then sit back and watch folks help you realize how special your car really is.
For your top, is the correct grain available in white and if so have you thought about having it dyed to match the correct color? I would think some kind of specialty shop could mix dyes to come up with what you need. Might have to be redyed at some point if its going to stay out in the sun a lot, but that would just make it look new again. Just a thought.
Later, Jim