I'm a "visual guy". For me, if it looks factory, it just isn't exciting enough. I've always liked for my cars to grab you by the throat, before you even hear the sound of lumpy cams, explosive throttle action, or squealing rubber!
In the end, you need to satisfy yourself. Do you want it to look vintage... or be a sleeper? ...maybe have a "sneaky personality"? Do you want people to take a second look... or a third... then get the camera out? It's up to you.