71 Scamp NASCAR style spoiler???

It’s your car, do with it what you please. My opinion on things like this is they always “look” better when they are functional. Meaning the rest of the car is being used in a way that now can benefit from some rear downforce and a spoiler is needed. FWIW there are a lot of very fast road race cars that have no aero at all. And some body styles (s2000 Honda for example) that at 100 mph loose all mechanical grip and benefit greatly from a well designed spoiler. Are you in Search of more grip at speed? Or is it for looks?