I think either Shelby type stripes up and over the car would be cool...but maybe instead of having them both the same size, maybe doing one stripe about 4" wide, and the other about 2" wide, and then off-set them over the passenger side of the car, not down the middle...

OR....

A really aggressive Tribal-style graphic with lots of sharp, pointy edges would be cool....really big, on the sides of the car...

Maybe out of a chrome silver reflective vinyl...

I dunno...just some ideas...

And I drive my Corvair MONZA a wee bit over the posted speed limit...does that count?