Steve,
Seeing as how you don't have a 60's Cobra,you only have 2 choices. Regular plate or personalized.I went personalized.
The Inspection sticker goes in the lower left corner of the windshield. "Place the windshield vaidation sticker within 6 inches of the safety inspection sticker".
You could always lie on the Offical State forms about what year your Superformance is.(Not Recommended)