I sorta like the idea, but I do agree the quarter isn't the place. Sometimes, cars that have specialized emblems like have them in the middle of the dog leg on the front fender down low, or on the panel under the trunk lid on the passenger's side. Maybe try that and see how it looks.
That said, nice car. ....and I like the painted brake drums. Screams 1970s. We used to do it all the time.